CINXE.COM

<!DOCTYPE html> <html class="client-nojs vector-feature-language-in-header-enabled vector-feature-language-in-main-page-header-disabled vector-feature-sticky-header-disabled vector-feature-page-tools-pinned-disabled vector-feature-toc-pinned-clientpref-1 vector-feature-main-menu-pinned-disabled vector-feature-limited-width-clientpref-1 vector-feature-limited-width-content-enabled vector-feature-custom-font-size-clientpref-1 vector-feature-appearance-pinned-clientpref-1 vector-feature-night-mode-enabled skin-theme-clientpref-day vector-toc-available" lang="en" dir="ltr"> <head> <meta charset="UTF-8"> <title>Squeeze bore - Wikipedia</title> <script>(function(){var className="client-js vector-feature-language-in-header-enabled vector-feature-language-in-main-page-header-disabled vector-feature-sticky-header-disabled vector-feature-page-tools-pinned-disabled vector-feature-toc-pinned-clientpref-1 vector-feature-main-menu-pinned-disabled vector-feature-limited-width-clientpref-1 vector-feature-limited-width-content-enabled vector-feature-custom-font-size-clientpref-1 vector-feature-appearance-pinned-clientpref-1 vector-feature-night-mode-enabled skin-theme-clientpref-day vector-toc-available";var cookie=document.cookie.match(/(?:^|; )enwikimwclientpreferences=([^;]+)/);if(cookie){cookie[1].split('%2C').forEach(function(pref){className=className.replace(new RegExp('(^| )'+pref.replace(/-clientpref-\w+$|[^\w-]+/g,'')+'-clientpref-\\w+( |$)'),'$1'+pref+'$2');});}document.documentElement.className=className;}());RLCONF={"wgBreakFrames":false,"wgSeparatorTransformTable":["",""],"wgDigitTransformTable":["",""],"wgDefaultDateFormat":"dmy", "wgMonthNames":["","January","February","March","April","May","June","July","August","September","October","November","December"],"wgRequestId":"d4ee340e-b0bb-417a-81ef-61d60d03cc59","wgCanonicalNamespace":"","wgCanonicalSpecialPageName":false,"wgNamespaceNumber":0,"wgPageName":"Squeeze_bore","wgTitle":"Squeeze bore","wgCurRevisionId":1258554388,"wgRevisionId":1258554388,"wgArticleId":23256496,"wgIsArticle":true,"wgIsRedirect":false,"wgAction":"view","wgUserName":null,"wgUserGroups":["*"],"wgCategories":["CS1 Swedish-language sources (sv)","Articles with short description","Short description matches Wikidata","Pages using multiple image with auto scaled images","Artillery components","Firearm components"],"wgPageViewLanguage":"en","wgPageContentLanguage":"en","wgPageContentModel":"wikitext","wgRelevantPageName":"Squeeze_bore","wgRelevantArticleId":23256496,"wgIsProbablyEditable":true,"wgRelevantPageIsProbablyEditable":true,"wgRestrictionEdit":[],"wgRestrictionMove":[],"wgNoticeProject" :"wikipedia","wgCiteReferencePreviewsActive":false,"wgFlaggedRevsParams":{"tags":{"status":{"levels":1}}},"wgMediaViewerOnClick":true,"wgMediaViewerEnabledByDefault":true,"wgPopupsFlags":0,"wgVisualEditor":{"pageLanguageCode":"en","pageLanguageDir":"ltr","pageVariantFallbacks":"en"},"wgMFDisplayWikibaseDescriptions":{"search":true,"watchlist":true,"tagline":false,"nearby":true},"wgWMESchemaEditAttemptStepOversample":false,"wgWMEPageLength":7000,"wgRelatedArticlesCompat":[],"wgCentralAuthMobileDomain":false,"wgEditSubmitButtonLabelPublish":true,"wgULSPosition":"interlanguage","wgULSisCompactLinksEnabled":false,"wgVector2022LanguageInHeader":true,"wgULSisLanguageSelectorEmpty":false,"wgWikibaseItemId":"Q11301631","wgCheckUserClientHintsHeadersJsApi":["brands","architecture","bitness","fullVersionList","mobile","model","platform","platformVersion"],"GEHomepageSuggestedEditsEnableTopics":true,"wgGETopicsMatchModeEnabled":false,"wgGEStructuredTaskRejectionReasonTextInputEnabled":false, "wgGELevelingUpEnabledForUser":false};RLSTATE={"ext.globalCssJs.user.styles":"ready","site.styles":"ready","user.styles":"ready","ext.globalCssJs.user":"ready","user":"ready","user.options":"loading","ext.cite.styles":"ready","mediawiki.page.gallery.styles":"ready","skins.vector.search.codex.styles":"ready","skins.vector.styles":"ready","skins.vector.icons":"ready","ext.wikimediamessages.styles":"ready","ext.visualEditor.desktopArticleTarget.noscript":"ready","ext.uls.interlanguage":"ready","wikibase.client.init":"ready","ext.wikimediaBadges":"ready"};RLPAGEMODULES=["ext.cite.ux-enhancements","mediawiki.page.media","site","mediawiki.page.ready","mediawiki.toc","skins.vector.js","ext.centralNotice.geoIP","ext.centralNotice.startUp","ext.gadget.ReferenceTooltips","ext.gadget.switcher","ext.urlShortener.toolbar","ext.centralauth.centralautologin","mmv.bootstrap","ext.popups","ext.visualEditor.desktopArticleTarget.init","ext.visualEditor.targetLoader","ext.echo.centralauth", "ext.eventLogging","ext.wikimediaEvents","ext.navigationTiming","ext.uls.interface","ext.cx.eventlogging.campaigns","ext.cx.uls.quick.actions","wikibase.client.vector-2022","ext.checkUser.clientHints","ext.growthExperiments.SuggestedEditSession","wikibase.sidebar.tracking"];</script> <script>(RLQ=window.RLQ||[]).push(function(){mw.loader.impl(function(){return["user.options@12s5i",function($,jQuery,require,module){mw.user.tokens.set({"patrolToken":"+\\","watchToken":"+\\","csrfToken":"+\\"}); }];});});</script> <link rel="stylesheet" href="/w/load.php?lang=en&modules=ext.cite.styles%7Cext.uls.interlanguage%7Cext.visualEditor.desktopArticleTarget.noscript%7Cext.wikimediaBadges%7Cext.wikimediamessages.styles%7Cmediawiki.page.gallery.styles%7Cskins.vector.icons%2Cstyles%7Cskins.vector.search.codex.styles%7Cwikibase.client.init&only=styles&skin=vector-2022"> <script async="" src="/w/load.php?lang=en&modules=startup&only=scripts&raw=1&skin=vector-2022"></script> <meta name="ResourceLoaderDynamicStyles" content=""> <link rel="stylesheet" href="/w/load.php?lang=en&modules=site.styles&only=styles&skin=vector-2022"> <meta name="generator" content="MediaWiki 1.44.0-wmf.4"> <meta name="referrer" content="origin"> <meta name="referrer" content="origin-when-cross-origin"> <meta name="robots" content="max-image-preview:standard"> <meta name="format-detection" content="telephone=no"> <meta property="og:image" content="https://upload.wikimedia.org/wikipedia/commons/thumb/1/17/75_mm_PaK_41fort_nelson2010.JPG/1200px-75_mm_PaK_41fort_nelson2010.JPG"> <meta property="og:image:width" content="1200"> <meta property="og:image:height" content="715"> <meta property="og:image" content="https://upload.wikimedia.org/wikipedia/commons/thumb/1/17/75_mm_PaK_41fort_nelson2010.JPG/800px-75_mm_PaK_41fort_nelson2010.JPG"> <meta property="og:image:width" content="800"> <meta property="og:image:height" content="477"> <meta property="og:image" content="https://upload.wikimedia.org/wikipedia/commons/thumb/1/17/75_mm_PaK_41fort_nelson2010.JPG/640px-75_mm_PaK_41fort_nelson2010.JPG"> <meta property="og:image:width" content="640"> <meta property="og:image:height" content="381"> <meta name="viewport" content="width=1120"> <meta property="og:title" content="Squeeze bore - Wikipedia"> <meta property="og:type" content="website"> <link rel="preconnect" href="//upload.wikimedia.org"> <link rel="alternate" media="only screen and (max-width: 640px)" href="//en.m.wikipedia.org/wiki/Squeeze_bore"> <link rel="alternate" type="application/x-wiki" title="Edit this page" href="/w/index.php?title=Squeeze_bore&action=edit"> <link rel="apple-touch-icon" href="/static/apple-touch/wikipedia.png"> <link rel="icon" href="/static/favicon/wikipedia.ico"> <link rel="search" type="application/opensearchdescription+xml" href="/w/rest.php/v1/search" title="Wikipedia (en)"> <link rel="EditURI" type="application/rsd+xml" href="//en.wikipedia.org/w/api.php?action=rsd"> <link rel="canonical" href="https://en.wikipedia.org/wiki/Squeeze_bore"> <link rel="license" href="https://creativecommons.org/licenses/by-sa/4.0/deed.en"> <link rel="alternate" type="application/atom+xml" title="Wikipedia Atom feed" href="/w/index.php?title=Special:RecentChanges&feed=atom"> <link rel="dns-prefetch" href="//meta.wikimedia.org" /> <link rel="dns-prefetch" href="//login.wikimedia.org"> </head> <body class="skin--responsive skin-vector skin-vector-search-vue mediawiki ltr sitedir-ltr mw-hide-empty-elt ns-0 ns-subject mw-editable page-Squeeze_bore rootpage-Squeeze_bore skin-vector-2022 action-view"><a class="mw-jump-link" href="#bodyContent">Jump to content</a> <div class="vector-header-container"> <header class="vector-header mw-header"> <div class="vector-header-start"> <nav class="vector-main-menu-landmark" aria-label="Site"> <div id="vector-main-menu-dropdown" class="vector-dropdown vector-main-menu-dropdown vector-button-flush-left vector-button-flush-right" > <input type="checkbox" id="vector-main-menu-dropdown-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-vector-main-menu-dropdown" class="vector-dropdown-checkbox " aria-label="Main menu" > <label id="vector-main-menu-dropdown-label" for="vector-main-menu-dropdown-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--icon-only " aria-hidden="true" ><span class="vector-icon mw-ui-icon-menu mw-ui-icon-wikimedia-menu"></span> <span class="vector-dropdown-label-text">Main menu</span> </label> <div class="vector-dropdown-content"> <div id="vector-main-menu-unpinned-container" class="vector-unpinned-container"> <div id="vector-main-menu" class="vector-main-menu vector-pinnable-element"> <div class="vector-pinnable-header vector-main-menu-pinnable-header vector-pinnable-header-unpinned" data-feature-name="main-menu-pinned" data-pinnable-element-id="vector-main-menu" data-pinned-container-id="vector-main-menu-pinned-container" data-unpinned-container-id="vector-main-menu-unpinned-container" > <div class="vector-pinnable-header-label">Main menu</div> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-pin-button" data-event-name="pinnable-header.vector-main-menu.pin">move to sidebar</button> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-unpin-button" data-event-name="pinnable-header.vector-main-menu.unpin">hide</button> </div> <div id="p-navigation" class="vector-menu mw-portlet mw-portlet-navigation" > <div class="vector-menu-heading"> Navigation </div> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="n-mainpage-description" class="mw-list-item"><a href="/wiki/Main_Page" title="Visit the main page [z]" accesskey="z"><span>Main page</span></a></li><li id="n-contents" class="mw-list-item"><a href="/wiki/Wikipedia:Contents" title="Guides to browsing Wikipedia"><span>Contents</span></a></li><li id="n-currentevents" class="mw-list-item"><a href="/wiki/Portal:Current_events" title="Articles related to current events"><span>Current events</span></a></li><li id="n-randompage" class="mw-list-item"><a href="/wiki/Special:Random" title="Visit a randomly selected article [x]" accesskey="x"><span>Random article</span></a></li><li id="n-aboutsite" class="mw-list-item"><a href="/wiki/Wikipedia:About" title="Learn about Wikipedia and how it works"><span>About Wikipedia</span></a></li><li id="n-contactpage" class="mw-list-item"><a href="//en.wikipedia.org/wiki/Wikipedia:Contact_us" title="How to contact Wikipedia"><span>Contact us</span></a></li> </ul> </div> </div> <div id="p-interaction" class="vector-menu mw-portlet mw-portlet-interaction" > <div class="vector-menu-heading"> Contribute </div> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="n-help" class="mw-list-item"><a href="/wiki/Help:Contents" title="Guidance on how to use and edit Wikipedia"><span>Help</span></a></li><li id="n-introduction" class="mw-list-item"><a href="/wiki/Help:Introduction" title="Learn how to edit Wikipedia"><span>Learn to edit</span></a></li><li id="n-portal" class="mw-list-item"><a href="/wiki/Wikipedia:Community_portal" title="The hub for editors"><span>Community portal</span></a></li><li id="n-recentchanges" class="mw-list-item"><a href="/wiki/Special:RecentChanges" title="A list of recent changes to Wikipedia [r]" accesskey="r"><span>Recent changes</span></a></li><li id="n-upload" class="mw-list-item"><a href="/wiki/Wikipedia:File_upload_wizard" title="Add images or other media for use on Wikipedia"><span>Upload file</span></a></li> </ul> </div> </div> </div> </div> </div> </div> </nav> <a href="/wiki/Main_Page" class="mw-logo"> <img class="mw-logo-icon" src="/static/images/icons/wikipedia.png" alt="" aria-hidden="true" height="50" width="50"> <span class="mw-logo-container skin-invert"> <img class="mw-logo-wordmark" alt="Wikipedia" src="/static/images/mobile/copyright/wikipedia-wordmark-en.svg" style="width: 7.5em; height: 1.125em;"> <img class="mw-logo-tagline" alt="The Free Encyclopedia" src="/static/images/mobile/copyright/wikipedia-tagline-en.svg" width="117" height="13" style="width: 7.3125em; height: 0.8125em;"> </span> </a> </div> <div class="vector-header-end"> <div id="p-search" role="search" class="vector-search-box-vue vector-search-box-collapses vector-search-box-show-thumbnail vector-search-box-auto-expand-width vector-search-box"> <a href="/wiki/Special:Search" class="cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--icon-only search-toggle" title="Search Wikipedia [f]" accesskey="f"><span class="vector-icon mw-ui-icon-search mw-ui-icon-wikimedia-search"></span> <span>Search</span> </a> <div class="vector-typeahead-search-container"> <div class="cdx-typeahead-search cdx-typeahead-search--show-thumbnail cdx-typeahead-search--auto-expand-width"> <form action="/w/index.php" id="searchform" class="cdx-search-input cdx-search-input--has-end-button"> <div id="simpleSearch" class="cdx-search-input__input-wrapper" data-search-loc="header-moved"> <div class="cdx-text-input cdx-text-input--has-start-icon"> <input class="cdx-text-input__input" type="search" name="search" placeholder="Search Wikipedia" aria-label="Search Wikipedia" autocapitalize="sentences" title="Search Wikipedia [f]" accesskey="f" id="searchInput" > <span class="cdx-text-input__icon cdx-text-input__start-icon"></span> </div> <input type="hidden" name="title" value="Special:Search"> </div> <button class="cdx-button cdx-search-input__end-button">Search</button> </form> </div> </div> </div> <nav class="vector-user-links vector-user-links-wide" aria-label="Personal tools"> <div class="vector-user-links-main"> <div id="p-vector-user-menu-preferences" class="vector-menu mw-portlet emptyPortlet" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> </ul> </div> </div> <div id="p-vector-user-menu-userpage" class="vector-menu mw-portlet emptyPortlet" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> </ul> </div> </div> <nav class="vector-appearance-landmark" aria-label="Appearance"> <div id="vector-appearance-dropdown" class="vector-dropdown " title="Change the appearance of the page's font size, width, and color" > <input type="checkbox" id="vector-appearance-dropdown-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-vector-appearance-dropdown" class="vector-dropdown-checkbox " aria-label="Appearance" > <label id="vector-appearance-dropdown-label" for="vector-appearance-dropdown-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--icon-only " aria-hidden="true" ><span class="vector-icon mw-ui-icon-appearance mw-ui-icon-wikimedia-appearance"></span> <span class="vector-dropdown-label-text">Appearance</span> </label> <div class="vector-dropdown-content"> <div id="vector-appearance-unpinned-container" class="vector-unpinned-container"> </div> </div> </div> </nav> <div id="p-vector-user-menu-notifications" class="vector-menu mw-portlet emptyPortlet" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> </ul> </div> </div> <div id="p-vector-user-menu-overflow" class="vector-menu mw-portlet" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="pt-sitesupport-2" class="user-links-collapsible-item mw-list-item user-links-collapsible-item"><a data-mw="interface" href="https://donate.wikimedia.org/wiki/Special:FundraiserRedirector?utm_source=donate&utm_medium=sidebar&utm_campaign=C13_en.wikipedia.org&uselang=en" class=""><span>Donate</span></a> </li> <li id="pt-createaccount-2" class="user-links-collapsible-item mw-list-item user-links-collapsible-item"><a data-mw="interface" href="/w/index.php?title=Special:CreateAccount&returnto=Squeeze+bore" title="You are encouraged to create an account and log in; however, it is not mandatory" class=""><span>Create account</span></a> </li> <li id="pt-login-2" class="user-links-collapsible-item mw-list-item user-links-collapsible-item"><a data-mw="interface" href="/w/index.php?title=Special:UserLogin&returnto=Squeeze+bore" title="You're encouraged to log in; however, it's not mandatory. [o]" accesskey="o" class=""><span>Log in</span></a> </li> </ul> </div> </div> </div> <div id="vector-user-links-dropdown" class="vector-dropdown vector-user-menu vector-button-flush-right vector-user-menu-logged-out" title="Log in and more options" > <input type="checkbox" id="vector-user-links-dropdown-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-vector-user-links-dropdown" class="vector-dropdown-checkbox " aria-label="Personal tools" > <label id="vector-user-links-dropdown-label" for="vector-user-links-dropdown-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--icon-only " aria-hidden="true" ><span class="vector-icon mw-ui-icon-ellipsis mw-ui-icon-wikimedia-ellipsis"></span> <span class="vector-dropdown-label-text">Personal tools</span> </label> <div class="vector-dropdown-content"> <div id="p-personal" class="vector-menu mw-portlet mw-portlet-personal user-links-collapsible-item" title="User menu" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="pt-sitesupport" class="user-links-collapsible-item mw-list-item"><a href="https://donate.wikimedia.org/wiki/Special:FundraiserRedirector?utm_source=donate&utm_medium=sidebar&utm_campaign=C13_en.wikipedia.org&uselang=en"><span>Donate</span></a></li><li id="pt-createaccount" class="user-links-collapsible-item mw-list-item"><a href="/w/index.php?title=Special:CreateAccount&returnto=Squeeze+bore" title="You are encouraged to create an account and log in; however, it is not mandatory"><span class="vector-icon mw-ui-icon-userAdd mw-ui-icon-wikimedia-userAdd"></span> <span>Create account</span></a></li><li id="pt-login" class="user-links-collapsible-item mw-list-item"><a href="/w/index.php?title=Special:UserLogin&returnto=Squeeze+bore" title="You're encouraged to log in; however, it's not mandatory. [o]" accesskey="o"><span class="vector-icon mw-ui-icon-logIn mw-ui-icon-wikimedia-logIn"></span> <span>Log in</span></a></li> </ul> </div> </div> <div id="p-user-menu-anon-editor" class="vector-menu mw-portlet mw-portlet-user-menu-anon-editor" > <div class="vector-menu-heading"> Pages for logged out editors <a href="/wiki/Help:Introduction" aria-label="Learn more about editing"><span>learn more</span></a> </div> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="pt-anoncontribs" class="mw-list-item"><a href="/wiki/Special:MyContributions" title="A list of edits made from this IP address [y]" accesskey="y"><span>Contributions</span></a></li><li id="pt-anontalk" class="mw-list-item"><a href="/wiki/Special:MyTalk" title="Discussion about edits from this IP address [n]" accesskey="n"><span>Talk</span></a></li> </ul> </div> </div> </div> </div> </nav> </div> </header> </div> <div class="mw-page-container"> <div class="mw-page-container-inner"> <div class="vector-sitenotice-container"> <div id="siteNotice"></div> </div> <div class="vector-column-start"> <div class="vector-main-menu-container"> <div id="mw-navigation"> <nav id="mw-panel" class="vector-main-menu-landmark" aria-label="Site"> <div id="vector-main-menu-pinned-container" class="vector-pinned-container"> </div> </nav> </div> </div> <div class="vector-sticky-pinned-container"> <nav id="mw-panel-toc" aria-label="Contents" data-event-name="ui.sidebar-toc" class="mw-table-of-contents-container vector-toc-landmark"> <div id="vector-toc-pinned-container" class="vector-pinned-container"> <div id="vector-toc" class="vector-toc vector-pinnable-element"> <div class="vector-pinnable-header vector-toc-pinnable-header vector-pinnable-header-pinned" data-feature-name="toc-pinned" data-pinnable-element-id="vector-toc" > <h2 class="vector-pinnable-header-label">Contents</h2> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-pin-button" data-event-name="pinnable-header.vector-toc.pin">move to sidebar</button> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-unpin-button" data-event-name="pinnable-header.vector-toc.unpin">hide</button> </div> <ul class="vector-toc-contents" id="mw-panel-toc-list"> <li id="toc-mw-content-text" class="vector-toc-list-item vector-toc-level-1"> <a href="#" class="vector-toc-link"> <div class="vector-toc-text">(Top)</div> </a> </li> <li id="toc-Mechanism" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Mechanism"> <div class="vector-toc-text"> <span class="vector-toc-numb">1</span> <span>Mechanism</span> </div> </a> <ul id="toc-Mechanism-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-History_and_usage" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#History_and_usage"> <div class="vector-toc-text"> <span class="vector-toc-numb">2</span> <span>History and usage</span> </div> </a> <ul id="toc-History_and_usage-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Gallery" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Gallery"> <div class="vector-toc-text"> <span class="vector-toc-numb">3</span> <span>Gallery</span> </div> </a> <ul id="toc-Gallery-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-See_also" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#See_also"> <div class="vector-toc-text"> <span class="vector-toc-numb">4</span> <span>See also</span> </div> </a> <ul id="toc-See_also-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-References" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#References"> <div class="vector-toc-text"> <span class="vector-toc-numb">5</span> <span>References</span> </div> </a> <ul id="toc-References-sublist" class="vector-toc-list"> </ul> </li> </ul> </div> </div> </nav> </div> </div> <div class="mw-content-container"> <main id="content" class="mw-body"> <header class="mw-body-header vector-page-titlebar"> <nav aria-label="Contents" class="vector-toc-landmark"> <div id="vector-page-titlebar-toc" class="vector-dropdown vector-page-titlebar-toc vector-button-flush-left" > <input type="checkbox" id="vector-page-titlebar-toc-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-vector-page-titlebar-toc" class="vector-dropdown-checkbox " aria-label="Toggle the table of contents" > <label id="vector-page-titlebar-toc-label" for="vector-page-titlebar-toc-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--icon-only " aria-hidden="true" ><span class="vector-icon mw-ui-icon-listBullet mw-ui-icon-wikimedia-listBullet"></span> <span class="vector-dropdown-label-text">Toggle the table of contents</span> </label> <div class="vector-dropdown-content"> <div id="vector-page-titlebar-toc-unpinned-container" class="vector-unpinned-container"> </div> </div> </div> </nav> <h1 id="firstHeading" class="firstHeading mw-first-heading"><span class="mw-page-title-main">Squeeze bore</span></h1> <div id="p-lang-btn" class="vector-dropdown mw-portlet mw-portlet-lang" > <input type="checkbox" id="p-lang-btn-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-p-lang-btn" class="vector-dropdown-checkbox mw-interlanguage-selector" aria-label="Go to an article in another language. Available in 8 languages" > <label id="p-lang-btn-label" for="p-lang-btn-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--action-progressive mw-portlet-lang-heading-8" aria-hidden="true" ><span class="vector-icon mw-ui-icon-language-progressive mw-ui-icon-wikimedia-language-progressive"></span> <span class="vector-dropdown-label-text">8 languages</span> </label> <div class="vector-dropdown-content"> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li class="interlanguage-link interwiki-bg mw-list-item"><a href="https://bg.wikipedia.org/wiki/%D0%9F%D1%80%D0%BE%D0%B5%D0%BA%D1%82%D0%B8%D0%BB_(%D0%BA%D1%83%D1%80%D1%88%D1%83%D0%BC)_%D0%BD%D0%B0_%D0%93%D0%B5%D1%80%D0%BB%D0%B8%D1%85" title="Проектил (куршум) на Герлих – Bulgarian" lang="bg" hreflang="bg" data-title="Проектил (куршум) на Герлих" data-language-autonym="Български" data-language-local-name="Bulgarian" class="interlanguage-link-target"><span>Български</span></a></li><li class="interlanguage-link interwiki-es mw-list-item"><a href="https://es.wikipedia.org/wiki/Ca%C3%B1%C3%B3n_reductor_perforante" title="Cañón reductor perforante – Spanish" lang="es" hreflang="es" data-title="Cañón reductor perforante" data-language-autonym="Español" data-language-local-name="Spanish" class="interlanguage-link-target"><span>Español</span></a></li><li class="interlanguage-link interwiki-id mw-list-item"><a href="https://id.wikipedia.org/wiki/Laras_menyempit" title="Laras menyempit – Indonesian" lang="id" hreflang="id" data-title="Laras menyempit" data-language-autonym="Bahasa Indonesia" data-language-local-name="Indonesian" class="interlanguage-link-target"><span>Bahasa Indonesia</span></a></li><li class="interlanguage-link interwiki-ja mw-list-item"><a href="https://ja.wikipedia.org/wiki/%E3%82%B2%E3%83%AB%E3%83%AA%E3%83%83%E3%83%92%E7%A0%B2" title="ゲルリッヒ砲 – Japanese" lang="ja" hreflang="ja" data-title="ゲルリッヒ砲" data-language-autonym="日本語" data-language-local-name="Japanese" class="interlanguage-link-target"><span>日本語</span></a></li><li class="interlanguage-link interwiki-pl mw-list-item"><a href="https://pl.wikipedia.org/wiki/Lufa_sto%C5%BCkowa" title="Lufa stożkowa – Polish" lang="pl" hreflang="pl" data-title="Lufa stożkowa" data-language-autonym="Polski" data-language-local-name="Polish" class="interlanguage-link-target"><span>Polski</span></a></li><li class="interlanguage-link interwiki-ru mw-list-item"><a href="https://ru.wikipedia.org/wiki/%D0%9A%D0%BE%D0%BD%D0%B8%D1%87%D0%B5%D1%81%D0%BA%D0%B8%D0%B9_%D1%81%D1%82%D0%B2%D0%BE%D0%BB" title="Конический ствол – Russian" lang="ru" hreflang="ru" data-title="Конический ствол" data-language-autonym="Русский" data-language-local-name="Russian" class="interlanguage-link-target"><span>Русский</span></a></li><li class="interlanguage-link interwiki-sv badge-Q70893996 mw-list-item" title=""><a href="https://sv.wikipedia.org/wiki/Mynningsf%C3%B6rtr%C3%A4ngare" title="Mynningsförträngare – Swedish" lang="sv" hreflang="sv" data-title="Mynningsförträngare" data-language-autonym="Svenska" data-language-local-name="Swedish" class="interlanguage-link-target"><span>Svenska</span></a></li><li class="interlanguage-link interwiki-tr mw-list-item"><a href="https://tr.wikipedia.org/wiki/Konik_namlu" title="Konik namlu – Turkish" lang="tr" hreflang="tr" data-title="Konik namlu" data-language-autonym="Türkçe" data-language-local-name="Turkish" class="interlanguage-link-target"><span>Türkçe</span></a></li> </ul> <div class="after-portlet after-portlet-lang"><span class="wb-langlinks-edit wb-langlinks-link"><a href="https://www.wikidata.org/wiki/Special:EntityPage/Q11301631#sitelinks-wikipedia" title="Edit interlanguage links" class="wbc-editpage">Edit links</a></span></div> </div> </div> </div> </header> <div class="vector-page-toolbar"> <div class="vector-page-toolbar-container"> <div id="left-navigation"> <nav aria-label="Namespaces"> <div id="p-associated-pages" class="vector-menu vector-menu-tabs mw-portlet mw-portlet-associated-pages" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="ca-nstab-main" class="selected vector-tab-noicon mw-list-item"><a href="/wiki/Squeeze_bore" title="View the content page [c]" accesskey="c"><span>Article</span></a></li><li id="ca-talk" class="vector-tab-noicon mw-list-item"><a href="/wiki/Talk:Squeeze_bore" rel="discussion" title="Discuss improvements to the content page [t]" accesskey="t"><span>Talk</span></a></li> </ul> </div> </div> <div id="vector-variants-dropdown" class="vector-dropdown emptyPortlet" > <input type="checkbox" id="vector-variants-dropdown-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-vector-variants-dropdown" class="vector-dropdown-checkbox " aria-label="Change language variant" > <label id="vector-variants-dropdown-label" for="vector-variants-dropdown-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet" aria-hidden="true" ><span class="vector-dropdown-label-text">English</span> </label> <div class="vector-dropdown-content"> <div id="p-variants" class="vector-menu mw-portlet mw-portlet-variants emptyPortlet" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> </ul> </div> </div> </div> </div> </nav> </div> <div id="right-navigation" class="vector-collapsible"> <nav aria-label="Views"> <div id="p-views" class="vector-menu vector-menu-tabs mw-portlet mw-portlet-views" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="ca-view" class="selected vector-tab-noicon mw-list-item"><a href="/wiki/Squeeze_bore"><span>Read</span></a></li><li id="ca-edit" class="vector-tab-noicon mw-list-item"><a href="/w/index.php?title=Squeeze_bore&action=edit" title="Edit this page [e]" accesskey="e"><span>Edit</span></a></li><li id="ca-history" class="vector-tab-noicon mw-list-item"><a href="/w/index.php?title=Squeeze_bore&action=history" title="Past revisions of this page [h]" accesskey="h"><span>View history</span></a></li> </ul> </div> </div> </nav> <nav class="vector-page-tools-landmark" aria-label="Page tools"> <div id="vector-page-tools-dropdown" class="vector-dropdown vector-page-tools-dropdown" > <input type="checkbox" id="vector-page-tools-dropdown-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-vector-page-tools-dropdown" class="vector-dropdown-checkbox " aria-label="Tools" > <label id="vector-page-tools-dropdown-label" for="vector-page-tools-dropdown-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet" aria-hidden="true" ><span class="vector-dropdown-label-text">Tools</span> </label> <div class="vector-dropdown-content"> <div id="vector-page-tools-unpinned-container" class="vector-unpinned-container"> <div id="vector-page-tools" class="vector-page-tools vector-pinnable-element"> <div class="vector-pinnable-header vector-page-tools-pinnable-header vector-pinnable-header-unpinned" data-feature-name="page-tools-pinned" data-pinnable-element-id="vector-page-tools" data-pinned-container-id="vector-page-tools-pinned-container" data-unpinned-container-id="vector-page-tools-unpinned-container" > <div class="vector-pinnable-header-label">Tools</div> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-pin-button" data-event-name="pinnable-header.vector-page-tools.pin">move to sidebar</button> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-unpin-button" data-event-name="pinnable-header.vector-page-tools.unpin">hide</button> </div> <div id="p-cactions" class="vector-menu mw-portlet mw-portlet-cactions emptyPortlet vector-has-collapsible-items" title="More options" > <div class="vector-menu-heading"> Actions </div> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="ca-more-view" class="selected vector-more-collapsible-item mw-list-item"><a href="/wiki/Squeeze_bore"><span>Read</span></a></li><li id="ca-more-edit" class="vector-more-collapsible-item mw-list-item"><a href="/w/index.php?title=Squeeze_bore&action=edit" title="Edit this page [e]" accesskey="e"><span>Edit</span></a></li><li id="ca-more-history" class="vector-more-collapsible-item mw-list-item"><a href="/w/index.php?title=Squeeze_bore&action=history"><span>View history</span></a></li> </ul> </div> </div> <div id="p-tb" class="vector-menu mw-portlet mw-portlet-tb" > <div class="vector-menu-heading"> General </div> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="t-whatlinkshere" class="mw-list-item"><a href="/wiki/Special:WhatLinksHere/Squeeze_bore" title="List of all English Wikipedia pages containing links to this page [j]" accesskey="j"><span>What links here</span></a></li><li id="t-recentchangeslinked" class="mw-list-item"><a href="/wiki/Special:RecentChangesLinked/Squeeze_bore" rel="nofollow" title="Recent changes in pages linked from this page [k]" accesskey="k"><span>Related changes</span></a></li><li id="t-upload" class="mw-list-item"><a href="/wiki/Wikipedia:File_Upload_Wizard" title="Upload files [u]" accesskey="u"><span>Upload file</span></a></li><li id="t-specialpages" class="mw-list-item"><a href="/wiki/Special:SpecialPages" title="A list of all special pages [q]" accesskey="q"><span>Special pages</span></a></li><li id="t-permalink" class="mw-list-item"><a href="/w/index.php?title=Squeeze_bore&oldid=1258554388" title="Permanent link to this revision of this page"><span>Permanent link</span></a></li><li id="t-info" class="mw-list-item"><a href="/w/index.php?title=Squeeze_bore&action=info" title="More information about this page"><span>Page information</span></a></li><li id="t-cite" class="mw-list-item"><a href="/w/index.php?title=Special:CiteThisPage&page=Squeeze_bore&id=1258554388&wpFormIdentifier=titleform" title="Information on how to cite this page"><span>Cite this page</span></a></li><li id="t-urlshortener" class="mw-list-item"><a href="/w/index.php?title=Special:UrlShortener&url=https%3A%2F%2Fen.wikipedia.org%2Fwiki%2FSqueeze_bore"><span>Get shortened URL</span></a></li><li id="t-urlshortener-qrcode" class="mw-list-item"><a href="/w/index.php?title=Special:QrCode&url=https%3A%2F%2Fen.wikipedia.org%2Fwiki%2FSqueeze_bore"><span>Download QR code</span></a></li> </ul> </div> </div> <div id="p-coll-print_export" class="vector-menu mw-portlet mw-portlet-coll-print_export" > <div class="vector-menu-heading"> Print/export </div> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="coll-download-as-rl" class="mw-list-item"><a href="/w/index.php?title=Special:DownloadAsPdf&page=Squeeze_bore&action=show-download-screen" title="Download this page as a PDF file"><span>Download as PDF</span></a></li><li id="t-print" class="mw-list-item"><a href="/w/index.php?title=Squeeze_bore&printable=yes" title="Printable version of this page [p]" accesskey="p"><span>Printable version</span></a></li> </ul> </div> </div> <div id="p-wikibase-otherprojects" class="vector-menu mw-portlet mw-portlet-wikibase-otherprojects" > <div class="vector-menu-heading"> In other projects </div> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li class="wb-otherproject-link wb-otherproject-commons mw-list-item"><a href="https://commons.wikimedia.org/wiki/Category:Squeeze_bore" hreflang="en"><span>Wikimedia Commons</span></a></li><li id="t-wikibase" class="wb-otherproject-link wb-otherproject-wikibase-dataitem mw-list-item"><a href="https://www.wikidata.org/wiki/Special:EntityPage/Q11301631" title="Structured data on this page hosted by Wikidata [g]" accesskey="g"><span>Wikidata item</span></a></li> </ul> </div> </div> </div> </div> </div> </div> </nav> </div> </div> </div> <div class="vector-column-end"> <div class="vector-sticky-pinned-container"> <nav class="vector-page-tools-landmark" aria-label="Page tools"> <div id="vector-page-tools-pinned-container" class="vector-pinned-container"> </div> </nav> <nav class="vector-appearance-landmark" aria-label="Appearance"> <div id="vector-appearance-pinned-container" class="vector-pinned-container"> <div id="vector-appearance" class="vector-appearance vector-pinnable-element"> <div class="vector-pinnable-header vector-appearance-pinnable-header vector-pinnable-header-pinned" data-feature-name="appearance-pinned" data-pinnable-element-id="vector-appearance" data-pinned-container-id="vector-appearance-pinned-container" data-unpinned-container-id="vector-appearance-unpinned-container" > <div class="vector-pinnable-header-label">Appearance</div> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-pin-button" data-event-name="pinnable-header.vector-appearance.pin">move to sidebar</button> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-unpin-button" data-event-name="pinnable-header.vector-appearance.unpin">hide</button> </div> </div> </div> </nav> </div> </div> <div id="bodyContent" class="vector-body" aria-labelledby="firstHeading" data-mw-ve-target-container> <div class="vector-body-before-content"> <div class="mw-indicators"> </div> <div id="siteSub" class="noprint">From Wikipedia, the free encyclopedia</div> </div> <div id="contentSub"><div id="mw-content-subtitle"></div></div> <div id="mw-content-text" class="mw-body-content"><div class="mw-content-ltr mw-parser-output" lang="en" dir="ltr"><div class="shortdescription nomobile noexcerpt noprint searchaux" style="display:none">Weapon type</div> <style data-mw-deduplicate="TemplateStyles:r1237032888/mw-parser-output/.tmulti">.mw-parser-output .tmulti .multiimageinner{display:flex;flex-direction:column}.mw-parser-output .tmulti .trow{display:flex;flex-direction:row;clear:left;flex-wrap:wrap;width:100%;box-sizing:border-box}.mw-parser-output .tmulti .tsingle{margin:1px;float:left}.mw-parser-output .tmulti .theader{clear:both;font-weight:bold;text-align:center;align-self:center;background-color:transparent;width:100%}.mw-parser-output .tmulti .thumbcaption{background-color:transparent}.mw-parser-output .tmulti .text-align-left{text-align:left}.mw-parser-output .tmulti .text-align-right{text-align:right}.mw-parser-output .tmulti .text-align-center{text-align:center}@media all and (max-width:720px){.mw-parser-output .tmulti .thumbinner{width:100%!important;box-sizing:border-box;max-width:none!important;align-items:center}.mw-parser-output .tmulti .trow{justify-content:center}.mw-parser-output .tmulti .tsingle{float:none!important;max-width:100%!important;box-sizing:border-box;text-align:center}.mw-parser-output .tmulti .tsingle .thumbcaption{text-align:left}.mw-parser-output .tmulti .trow>.thumbcaption{text-align:center}}@media screen{html.skin-theme-clientpref-night .mw-parser-output .tmulti .multiimageinner img{background-color:white}}@media screen and (prefers-color-scheme:dark){html.skin-theme-clientpref-os .mw-parser-output .tmulti .multiimageinner img{background-color:white}}</style><div class="thumb tmulti tright"><div class="thumbinner multiimageinner" style="width:292px;max-width:292px"><div class="trow"><div class="theader">Historical squeeze bore example:</div></div><div class="trow"><div class="tsingle" style="width:290px;max-width:290px"><div class="thumbimage" style="height:171px;overflow:hidden"><span typeof="mw:File"><a href="/wiki/File:75_mm_PaK_41fort_nelson2010.JPG" class="mw-file-description"><img alt="" src="//upload.wikimedia.org/wikipedia/commons/thumb/1/17/75_mm_PaK_41fort_nelson2010.JPG/288px-75_mm_PaK_41fort_nelson2010.JPG" decoding="async" width="288" height="172" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/1/17/75_mm_PaK_41fort_nelson2010.JPG/432px-75_mm_PaK_41fort_nelson2010.JPG 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/1/17/75_mm_PaK_41fort_nelson2010.JPG/576px-75_mm_PaK_41fort_nelson2010.JPG 2x" data-file-width="3664" data-file-height="2183" /></a></span></div><div class="thumbcaption"><a href="/wiki/7.5_cm_Pak_41" title="7.5 cm Pak 41">7.5 cm Pak 41</a> squeeze bore gun</div></div></div><div class="trow"><div class="tsingle" style="width:290px;max-width:290px"><div class="thumbimage" style="height:191px;overflow:hidden"><span typeof="mw:File"><a href="/wiki/File:APBCT.jpg" class="mw-file-description"><img alt="" src="//upload.wikimedia.org/wikipedia/commons/thumb/7/71/APBCT.jpg/288px-APBCT.jpg" decoding="async" width="288" height="192" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/7/71/APBCT.jpg/432px-APBCT.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/7/71/APBCT.jpg/576px-APBCT.jpg 2x" data-file-width="896" data-file-height="597" /></a></span></div><div class="thumbcaption"><a href="/wiki/7.5_cm_Pak_41" title="7.5 cm Pak 41">7.5 cm Pak 41</a> flange-projectiles.<br />Left: <a href="/wiki/Armor-piercing_composite_non-rigid" class="mw-redirect" title="Armor-piercing composite non-rigid">Armor-piercing composite non-rigid</a> (APCNR)<br />Right: <a href="/wiki/Armor-piercing" class="mw-redirect" title="Armor-piercing">Armor-piercing</a> (AP)</div></div></div></div></div> <p>A <b>squeeze bore</b>, alternatively <b>taper-bore</b>, <b>cone barrel</b> or <b>conical barrel</b>, is a weapon where the internal <a href="/wiki/Gun_barrel" title="Gun barrel">barrel</a> diameter progressively decreases towards the <a href="/wiki/Muzzle_(firearms)" class="mw-redirect" title="Muzzle (firearms)">muzzle</a> resulting in a reduced final internal diameter. These weapons are used in conjunction with special <a href="/wiki/Sub-caliber_ammunition" title="Sub-caliber ammunition">sub-caliber ammunition</a> where the projectile is fitted with soft-metal <a href="/wiki/Flange" title="Flange">flanges</a> which fills out the caliber.<sup id="cite_ref-:0_1-0" class="reference"><a href="#cite_note-:0-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup> As the projectile travels through the squeeze bore the flanges fold inwards, resulting in a reduced caliber round with an increased velocity compared to a traditional full-caliber round.<sup id="cite_ref-:0_1-1" class="reference"><a href="#cite_note-:0-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup> </p> <meta property="mw:PageProp/toc" /> <div class="mw-heading mw-heading2"><h2 id="Mechanism">Mechanism</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Squeeze_bore&action=edit&section=1" title="Edit section: Mechanism"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <figure class="mw-default-size mw-halign-left" typeof="mw:File/Thumb"><a href="/wiki/File:Squeezebore_Diagram_Example.png" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/4/42/Squeezebore_Diagram_Example.png/500px-Squeezebore_Diagram_Example.png" decoding="async" width="500" height="42" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/4/42/Squeezebore_Diagram_Example.png/750px-Squeezebore_Diagram_Example.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/4/42/Squeezebore_Diagram_Example.png/1000px-Squeezebore_Diagram_Example.png 2x" data-file-width="1920" data-file-height="163" /></a><figcaption>Diagram of the squeeze bore concept</figcaption></figure> <p>A squeeze bore utilizes the energy of the <a href="/wiki/Propellant" title="Propellant">propellant</a> to squeeze the diameter of the <a href="/wiki/Bullet" title="Bullet">bullet</a> or <a href="/wiki/Shell_(projectile)" title="Shell (projectile)">shell</a> down, increasing penetration and velocity significantly. This process also meant high chamber pressure and low barrel service life.<sup id="cite_ref-FW9_2-0" class="reference"><a href="#cite_note-FW9-2"><span class="cite-bracket">[</span>2<span class="cite-bracket">]</span></a></sup> For example, the service life of a squeeze bore <a href="/wiki/7.5_cm_Pak_41" title="7.5 cm Pak 41">7.5 cm Pak 41</a> could be as low as 1000 rounds compared to 5000-7000 rounds for the <a href="/wiki/7.5_cm_Pak_39" title="7.5 cm Pak 39">7.5 cm Pak 39 (L/48)</a>.<sup id="cite_ref-3" class="reference"><a href="#cite_note-3"><span class="cite-bracket">[</span>3<span class="cite-bracket">]</span></a></sup> The diameter of a fired shell could decrease as much as 40% from .50 caliber to .30 caliber (achieved in a version of the <a href="/wiki/M2_machine_gun" class="mw-redirect" title="M2 machine gun">M2 machine gun</a>). Rather than squeezing solid shot, this is accomplished through a hardened penetrator core (<a href="/wiki/Tungsten" title="Tungsten">tungsten</a> for example) and a softer outer jacket (<a href="/wiki/Aluminium_alloy" title="Aluminium alloy">aluminium alloy</a>) forming flanges or wings. This outer jacket was crushed as the projectile left the barrel.<sup id="cite_ref-FW17_4-0" class="reference"><a href="#cite_note-FW17-4"><span class="cite-bracket">[</span>4<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-WeaponsMan_5-0" class="reference"><a href="#cite_note-WeaponsMan-5"><span class="cite-bracket">[</span>5<span class="cite-bracket">]</span></a></sup> </p><p>The squeeze bore concept typically was used in anti-tank guns before the widespread use of <a href="/wiki/Shaped_charge" title="Shaped charge">shaped charges</a>.<sup id="cite_ref-FW17_4-1" class="reference"><a href="#cite_note-FW17-4"><span class="cite-bracket">[</span>4<span class="cite-bracket">]</span></a></sup> Later, the perfection of <a href="/wiki/Armour-piercing_discarding_sabot" title="Armour-piercing discarding sabot">discarding sabot ammo</a>, which is based on the same concept of using a larger caliber barrel to fire a smaller caliber projectile at high-speed, negated the need for the squeeze bore concept.<sup id="cite_ref-FW9_2-1" class="reference"><a href="#cite_note-FW9-2"><span class="cite-bracket">[</span>2<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading2"><h2 id="History_and_usage">History and usage</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Squeeze_bore&action=edit&section=2" title="Edit section: History and usage"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <figure class="mw-default-size" typeof="mw:File/Thumb"><a href="/wiki/File:Gerlich_Squeeze_Bore_Patent.jpg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/2/28/Gerlich_Squeeze_Bore_Patent.jpg/170px-Gerlich_Squeeze_Bore_Patent.jpg" decoding="async" width="170" height="255" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/2/28/Gerlich_Squeeze_Bore_Patent.jpg/255px-Gerlich_Squeeze_Bore_Patent.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/2/28/Gerlich_Squeeze_Bore_Patent.jpg/340px-Gerlich_Squeeze_Bore_Patent.jpg 2x" data-file-width="656" data-file-height="984" /></a><figcaption>The original patent filed by Hermann Gerlich in 1932<sup id="cite_ref-FPO_6-0" class="reference"><a href="#cite_note-FPO-6"><span class="cite-bracket">[</span>6<span class="cite-bracket">]</span></a></sup></figcaption></figure> <p>The squeeze bore concept was first patented by German Karl Puff in 1903, even though the general principle was known already in 19th century and used in <a href="/wiki/Armstrong_gun" title="Armstrong gun">Armstrong guns</a>. Later, Hermann Gerlich in the 1920s and 1930s experimented with the concept resulting in an experimental 7cm anti-tank rifle with a 1,800 m/s (5,900 ft/s). This led to the squeeze bore concept sometimes being called the "<b>Gerlich principle</b>". </p><p>Between 1939-40, <a href="/wiki/Mauser" title="Mauser">Mauser-Werk AG</a> produced the 2.8 cm sPzB 41 and <a href="/wiki/Krupp" title="Krupp">Krupp</a> (in 1941) produced the 7.5 cm Pak 41. These were eventually discontinued due to the lack of tungsten and manufacturing complexity for the ammunition.<sup id="cite_ref-FW9_2-2" class="reference"><a href="#cite_note-FW9-2"><span class="cite-bracket">[</span>2<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-7" class="reference"><a href="#cite_note-7"><span class="cite-bracket">[</span>7<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-8" class="reference"><a href="#cite_note-8"><span class="cite-bracket">[</span>8<span class="cite-bracket">]</span></a></sup> </p><p>Other uses of the squeeze bore include the British <a href="/wiki/Littlejohn_adaptor" title="Littlejohn adaptor">Littlejohn adaptor</a>, a <a href="/wiki/Ordnance_QF_6-pounder" title="Ordnance QF 6-pounder">QF 6-pounder</a> adapter and a version of the M2 machine gun produced during WW2.<sup id="cite_ref-WeaponsMan_5-1" class="reference"><a href="#cite_note-WeaponsMan-5"><span class="cite-bracket">[</span>5<span class="cite-bracket">]</span></a></sup> Squeezing down from 40mm to 30mm, 57mm to 42.6mm, and .50 caliber to .30 caliber respectively. The Littlejohn adapter was used to extend the service life of the <a href="/wiki/Ordnance_QF_2-pounder" title="Ordnance QF 2-pounder">QF 2-pounder</a> and was designed by <a href="/wiki/Franti%C5%A1ek_Jane%C4%8Dek" title="František Janeček">František Janeček</a> whose anglicized name gave the Littlejohn its designation. The QF 6-pounder adapter was never adopted. </p> <div class="mw-heading mw-heading2"><h2 id="Gallery">Gallery</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Squeeze_bore&action=edit&section=3" title="Edit section: Gallery"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul class="gallery mw-gallery-traditional"> <li class="gallerybox" style="width: 155px"> <div class="thumb" style="width: 150px; height: 150px;"><span typeof="mw:File"><a href="/wiki/File:The_British_Army_in_Sicily_1943_NA4961.jpg" class="mw-file-description" title="2.8 cm sPzB 41 squeeze-bore anti-tank gun captured by British forces in Sicily 1943."><img alt="2.8 cm sPzB 41 squeeze-bore anti-tank gun captured by British forces in Sicily 1943." src="//upload.wikimedia.org/wikipedia/commons/thumb/8/84/The_British_Army_in_Sicily_1943_NA4961.jpg/120px-The_British_Army_in_Sicily_1943_NA4961.jpg" decoding="async" width="120" height="119" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/8/84/The_British_Army_in_Sicily_1943_NA4961.jpg/180px-The_British_Army_in_Sicily_1943_NA4961.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/8/84/The_British_Army_in_Sicily_1943_NA4961.jpg/240px-The_British_Army_in_Sicily_1943_NA4961.jpg 2x" data-file-width="800" data-file-height="793" /></a></span></div> <div class="gallerytext"><a href="/wiki/2.8_cm_sPzB_41" title="2.8 cm sPzB 41">2.8 cm sPzB 41</a> squeeze-bore anti-tank gun captured by British forces in Sicily 1943.</div> </li> <li class="gallerybox" style="width: 155px"> <div class="thumb" style="width: 150px; height: 150px;"><span typeof="mw:File"><a href="/wiki/File:Armata_przeciwpancerna_Pak_41_kal_42_mm_na_ulicy_w%C5%82oskiego_miasta_(2-2100).jpg" class="mw-file-description" title="4.2 cm Pak 41 light squeeze-bore anti-tank gun in Italy 1943."><img alt="4.2 cm Pak 41 light squeeze-bore anti-tank gun in Italy 1943." src="//upload.wikimedia.org/wikipedia/commons/thumb/0/05/Armata_przeciwpancerna_Pak_41_kal_42_mm_na_ulicy_w%C5%82oskiego_miasta_%282-2100%29.jpg/120px-Armata_przeciwpancerna_Pak_41_kal_42_mm_na_ulicy_w%C5%82oskiego_miasta_%282-2100%29.jpg" decoding="async" width="120" height="84" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/0/05/Armata_przeciwpancerna_Pak_41_kal_42_mm_na_ulicy_w%C5%82oskiego_miasta_%282-2100%29.jpg/180px-Armata_przeciwpancerna_Pak_41_kal_42_mm_na_ulicy_w%C5%82oskiego_miasta_%282-2100%29.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/0/05/Armata_przeciwpancerna_Pak_41_kal_42_mm_na_ulicy_w%C5%82oskiego_miasta_%282-2100%29.jpg/240px-Armata_przeciwpancerna_Pak_41_kal_42_mm_na_ulicy_w%C5%82oskiego_miasta_%282-2100%29.jpg 2x" data-file-width="3500" data-file-height="2457" /></a></span></div> <div class="gallerytext"><a href="/wiki/4.2_cm_Pak_41" title="4.2 cm Pak 41">4.2 cm Pak 41</a> light squeeze-bore anti-tank gun in Italy 1943.</div> </li> <li class="gallerybox" style="width: 155px"> <div class="thumb" style="width: 150px; height: 150px;"><span typeof="mw:File"><a href="/wiki/File:German_10,5_cm_squeeze_bore.png" class="mw-file-description" title="A German 10 cm schwere Kanone 18 with an 8,8 cm squeeze-bore adapter attached to the muzzle.[1]"><img alt="A German 10 cm schwere Kanone 18 with an 8,8 cm squeeze-bore adapter attached to the muzzle.[1]" src="//upload.wikimedia.org/wikipedia/commons/thumb/0/0c/German_10%2C5_cm_squeeze_bore.png/120px-German_10%2C5_cm_squeeze_bore.png" decoding="async" width="120" height="68" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/0/0c/German_10%2C5_cm_squeeze_bore.png/180px-German_10%2C5_cm_squeeze_bore.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/0/0c/German_10%2C5_cm_squeeze_bore.png/240px-German_10%2C5_cm_squeeze_bore.png 2x" data-file-width="540" data-file-height="307" /></a></span></div> <div class="gallerytext">A German <a href="/wiki/10_cm_schwere_Kanone_18" title="10 cm schwere Kanone 18">10 cm schwere Kanone 18</a> with an 8,8 cm squeeze-bore adapter attached to the muzzle.<sup id="cite_ref-:0_1-2" class="reference"><a href="#cite_note-:0-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup></div> </li> <li class="gallerybox" style="width: 155px"> <div class="thumb" style="width: 150px; height: 150px;"><span typeof="mw:File"><a href="/wiki/File:Tanks_and_Afvs_of_the_British_Army_1939-45_KID4781.jpg" class="mw-file-description" title="A Mk VII Tetrarch Mk I with a squeeze-bore Littlejohn adaptor."><img alt="A Mk VII Tetrarch Mk I with a squeeze-bore Littlejohn adaptor." src="//upload.wikimedia.org/wikipedia/commons/thumb/9/98/Tanks_and_Afvs_of_the_British_Army_1939-45_KID4781.jpg/120px-Tanks_and_Afvs_of_the_British_Army_1939-45_KID4781.jpg" decoding="async" width="120" height="96" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/9/98/Tanks_and_Afvs_of_the_British_Army_1939-45_KID4781.jpg/180px-Tanks_and_Afvs_of_the_British_Army_1939-45_KID4781.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/9/98/Tanks_and_Afvs_of_the_British_Army_1939-45_KID4781.jpg/240px-Tanks_and_Afvs_of_the_British_Army_1939-45_KID4781.jpg 2x" data-file-width="800" data-file-height="639" /></a></span></div> <div class="gallerytext">A <a href="/wiki/Tetrarch_tank" class="mw-redirect" title="Tetrarch tank">Mk VII Tetrarch Mk I</a> with a squeeze-bore <a href="/wiki/Littlejohn_adaptor" title="Littlejohn adaptor">Littlejohn adaptor</a>. </div> </li> </ul> <div class="mw-heading mw-heading2"><h2 id="See_also">See also</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Squeeze_bore&action=edit&section=4" title="Edit section: See also"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li><a href="/wiki/Choke_(firearms)" title="Choke (firearms)">Choke (firearms)</a></li></ul> <p><b>Squeeze bore artillery</b> </p> <ul><li><a href="/wiki/2.8_cm_sPzB_41" title="2.8 cm sPzB 41">2.8 cm sPzB 41</a></li> <li><a href="/wiki/4.2_cm_Pak_41" title="4.2 cm Pak 41">4.2 cm Pak 41</a></li> <li><a href="/wiki/7.5_cm_Pak_41" title="7.5 cm Pak 41">7.5 cm Pak 41</a></li></ul> <div class="mw-heading mw-heading2"><h2 id="References">References</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Squeeze_bore&action=edit&section=5" title="Edit section: References"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <style data-mw-deduplicate="TemplateStyles:r1239543626">.mw-parser-output .reflist{margin-bottom:0.5em;list-style-type:decimal}@media screen{.mw-parser-output .reflist{font-size:90%}}.mw-parser-output .reflist .references{font-size:100%;margin-bottom:0;list-style-type:inherit}.mw-parser-output .reflist-columns-2{column-width:30em}.mw-parser-output .reflist-columns-3{column-width:25em}.mw-parser-output .reflist-columns{margin-top:0.3em}.mw-parser-output .reflist-columns ol{margin-top:0}.mw-parser-output .reflist-columns li{page-break-inside:avoid;break-inside:avoid-column}.mw-parser-output .reflist-upper-alpha{list-style-type:upper-alpha}.mw-parser-output .reflist-upper-roman{list-style-type:upper-roman}.mw-parser-output .reflist-lower-alpha{list-style-type:lower-alpha}.mw-parser-output .reflist-lower-greek{list-style-type:lower-greek}.mw-parser-output .reflist-lower-roman{list-style-type:lower-roman}</style><div class="reflist"> <div class="mw-references-wrap"><ol class="references"> <li id="cite_note-:0-1"><span class="mw-cite-backlink">^ <a href="#cite_ref-:0_1-0"><sup><i><b>a</b></i></sup></a> <a href="#cite_ref-:0_1-1"><sup><i><b>b</b></i></sup></a> <a href="#cite_ref-:0_1-2"><sup><i><b>c</b></i></sup></a></span> <span class="reference-text"><style data-mw-deduplicate="TemplateStyles:r1238218222">.mw-parser-output cite.citation{font-style:inherit;word-wrap:break-word}.mw-parser-output .citation q{quotes:"\"""\"""'""'"}.mw-parser-output .citation:target{background-color:rgba(0,127,255,0.133)}.mw-parser-output .id-lock-free.id-lock-free a{background:url("//upload.wikimedia.org/wikipedia/commons/6/65/Lock-green.svg")right 0.1em center/9px no-repeat}.mw-parser-output .id-lock-limited.id-lock-limited a,.mw-parser-output .id-lock-registration.id-lock-registration a{background:url("//upload.wikimedia.org/wikipedia/commons/d/d6/Lock-gray-alt-2.svg")right 0.1em center/9px no-repeat}.mw-parser-output .id-lock-subscription.id-lock-subscription a{background:url("//upload.wikimedia.org/wikipedia/commons/a/aa/Lock-red-alt-2.svg")right 0.1em center/9px no-repeat}.mw-parser-output .cs1-ws-icon a{background:url("//upload.wikimedia.org/wikipedia/commons/4/4c/Wikisource-logo.svg")right 0.1em center/12px no-repeat}body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-free a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-limited a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-registration a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-subscription a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .cs1-ws-icon a{background-size:contain;padding:0 1em 0 0}.mw-parser-output .cs1-code{color:inherit;background:inherit;border:none;padding:inherit}.mw-parser-output .cs1-hidden-error{display:none;color:var(--color-error,#d33)}.mw-parser-output .cs1-visible-error{color:var(--color-error,#d33)}.mw-parser-output .cs1-maint{display:none;color:#085;margin-left:0.3em}.mw-parser-output .cs1-kern-left{padding-left:0.2em}.mw-parser-output .cs1-kern-right{padding-right:0.2em}.mw-parser-output .citation .mw-selflink{font-weight:inherit}@media screen{.mw-parser-output .cs1-format{font-size:95%}html.skin-theme-clientpref-night .mw-parser-output .cs1-maint{color:#18911f}}@media screen and (prefers-color-scheme:dark){html.skin-theme-clientpref-os .mw-parser-output .cs1-maint{color:#18911f}}</style><cite id="CITEREFRollof1953" class="citation journal cs1 cs1-prop-foreign-lang-source">Rollof, Yngve (1953). "Artillerimaterielens utvecklingstendenser under senaste decenniet" [The development tendencies of artillery materials during the last decade]. <i>Tidskrift i Sjöväsendet</i> [<i>Journal of the Maritime Administration</i>] (in Swedish). <b>116</b>: 421–451, 481–513. <a href="/wiki/ISSN_(identifier)" class="mw-redirect" title="ISSN (identifier)">ISSN</a> <a rel="nofollow" class="external text" href="https://search.worldcat.org/issn/0040-6945">0040-6945</a>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=article&rft.jtitle=Tidskrift+i+Sj%C3%B6v%C3%A4sendet&rft.atitle=Artillerimaterielens+utvecklingstendenser+under+senaste+decenniet&rft.volume=116&rft.pages=421-451%2C+481-513&rft.date=1953&rft.issn=0040-6945&rft.aulast=Rollof&rft.aufirst=Yngve&rfr_id=info%3Asid%2Fen.wikipedia.org%3ASqueeze+bore" class="Z3988"></span></span> </li> <li id="cite_note-FW9-2"><span class="mw-cite-backlink">^ <a href="#cite_ref-FW9_2-0"><sup><i><b>a</b></i></sup></a> <a href="#cite_ref-FW9_2-1"><sup><i><b>b</b></i></sup></a> <a href="#cite_ref-FW9_2-2"><sup><i><b>c</b></i></sup></a></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFMcCollum2017" class="citation web cs1">McCollum, Ian (18 February 2017). <a rel="nofollow" class="external text" href="https://www.youtube.com/watch?v=y-udMSKJL74">"Q&A #9: Gas Impingement, Reading List, Squeeze-Bores, and More!"</a>. <i>Forgotten Weapons</i>. Youtube. <a rel="nofollow" class="external text" href="https://ghostarchive.org/varchive/youtube/20211220/y-udMSKJL74">Archived</a> from the original on 2021-12-20<span class="reference-accessdate">. Retrieved <span class="nowrap">8 July</span> 2018</span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=Forgotten+Weapons&rft.atitle=Q%26A+%239%3A+Gas+Impingement%2C+Reading+List%2C+Squeeze-Bores%2C+and+More%21&rft.date=2017-02-18&rft.aulast=McCollum&rft.aufirst=Ian&rft_id=https%3A%2F%2Fwww.youtube.com%2Fwatch%3Fv%3Dy-udMSKJL74&rfr_id=info%3Asid%2Fen.wikipedia.org%3ASqueeze+bore" class="Z3988"></span></span> </li> <li id="cite_note-3"><span class="mw-cite-backlink"><b><a href="#cite_ref-3">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFAnkerstjerne" class="citation web cs1">Ankerstjerne, Christian. <a rel="nofollow" class="external text" href="https://panzerworld.com/anti-tank-ammunition#armor-piercing-composite-non-rigid">"Anti-tank Ammunition Types"</a>. <i>panzerworld.com</i>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=panzerworld.com&rft.atitle=Anti-tank+Ammunition+Types&rft.aulast=Ankerstjerne&rft.aufirst=Christian&rft_id=https%3A%2F%2Fpanzerworld.com%2Fanti-tank-ammunition%23armor-piercing-composite-non-rigid&rfr_id=info%3Asid%2Fen.wikipedia.org%3ASqueeze+bore" class="Z3988"></span></span> </li> <li id="cite_note-FW17-4"><span class="mw-cite-backlink">^ <a href="#cite_ref-FW17_4-0"><sup><i><b>a</b></i></sup></a> <a href="#cite_ref-FW17_4-1"><sup><i><b>b</b></i></sup></a></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFMcCollum2018" class="citation web cs1">McCollum, Ian (24 April 2018). <a rel="nofollow" class="external text" href="https://www.youtube.com/watch?v=08XhdWX_AN4">"Q&A #17: Bullpups, Stocked Pistols, Delayed Blowback, and More!"</a>. <i>Forgotten Weapons</i>. Youtube. <a rel="nofollow" class="external text" href="https://ghostarchive.org/varchive/youtube/20211220/08XhdWX_AN4">Archived</a> from the original on 2021-12-20<span class="reference-accessdate">. Retrieved <span class="nowrap">6 July</span> 2018</span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=Forgotten+Weapons&rft.atitle=Q%26A+%2317%3A+Bullpups%2C+Stocked+Pistols%2C+Delayed+Blowback%2C+and+More%21&rft.date=2018-04-24&rft.aulast=McCollum&rft.aufirst=Ian&rft_id=https%3A%2F%2Fwww.youtube.com%2Fwatch%3Fv%3D08XhdWX_AN4&rfr_id=info%3Asid%2Fen.wikipedia.org%3ASqueeze+bore" class="Z3988"></span></span> </li> <li id="cite_note-WeaponsMan-5"><span class="mw-cite-backlink">^ <a href="#cite_ref-WeaponsMan_5-0"><sup><i><b>a</b></i></sup></a> <a href="#cite_ref-WeaponsMan_5-1"><sup><i><b>b</b></i></sup></a></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="http://weaponsman.com/?p=21443">"Exotic Barrels Part 1: Squeeze Bores | WeaponsMan"</a>. <i>weaponsman.com</i>. WeaponsMan<span class="reference-accessdate">. Retrieved <span class="nowrap">6 July</span> 2018</span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=weaponsman.com&rft.atitle=Exotic+Barrels+Part+1%3A+Squeeze+Bores+%7C+WeaponsMan&rft_id=http%3A%2F%2Fweaponsman.com%2F%3Fp%3D21443&rfr_id=info%3Asid%2Fen.wikipedia.org%3ASqueeze+bore" class="Z3988"></span></span> </li> <li id="cite_note-FPO-6"><span class="mw-cite-backlink"><b><a href="#cite_ref-FPO_6-0">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFGerlich" class="citation web cs1">Gerlich, Hermann. <a rel="nofollow" class="external text" href="http://www.freepatentsonline.com/1944885.pdf">"Projectile"</a> <span class="cs1-format">(PDF)</span>. <i>www.freepatentsonline.com</i>. Free Patents Online<span class="reference-accessdate">. Retrieved <span class="nowrap">18 July</span> 2018</span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=www.freepatentsonline.com&rft.atitle=Projectile&rft.aulast=Gerlich&rft.aufirst=Hermann&rft_id=http%3A%2F%2Fwww.freepatentsonline.com%2F1944885.pdf&rfr_id=info%3Asid%2Fen.wikipedia.org%3ASqueeze+bore" class="Z3988"></span></span> </li> <li id="cite_note-7"><span class="mw-cite-backlink"><b><a href="#cite_ref-7">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="http://shootingwithhobie.blogspot.com/2011/01/squeeze-bore.html">"Squeeze Bore"</a>. <i>Shooting with Hobie</i>. 12 January 2011<span class="reference-accessdate">. Retrieved <span class="nowrap">8 July</span> 2018</span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=Shooting+with+Hobie&rft.atitle=Squeeze+Bore&rft.date=2011-01-12&rft_id=http%3A%2F%2Fshootingwithhobie.blogspot.com%2F2011%2F01%2Fsqueeze-bore.html&rfr_id=info%3Asid%2Fen.wikipedia.org%3ASqueeze+bore" class="Z3988"></span></span> </li> <li id="cite_note-8"><span class="mw-cite-backlink"><b><a href="#cite_ref-8">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFS.2016" class="citation web cs1">S., Rusty (20 May 2016). <a rel="nofollow" class="external text" href="https://www.thefirearmblog.com/blog/2016/05/20/mausers-high-tech-antitank-gun-2-8cm-spzb-41/">"Mauser's high-tech antitank gun: the 2.8cm sPzB 41 - The Firearm Blog"</a>. <i>The Firearm Blog</i><span class="reference-accessdate">. Retrieved <span class="nowrap">8 July</span> 2018</span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=The+Firearm+Blog&rft.atitle=Mauser%27s+high-tech+antitank+gun%3A+the+2.8cm+sPzB+41+-+The+Firearm+Blog&rft.date=2016-05-20&rft.aulast=S.&rft.aufirst=Rusty&rft_id=https%3A%2F%2Fwww.thefirearmblog.com%2Fblog%2F2016%2F05%2F20%2Fmausers-high-tech-antitank-gun-2-8cm-spzb-41%2F&rfr_id=info%3Asid%2Fen.wikipedia.org%3ASqueeze+bore" class="Z3988"></span></span> </li> </ol></div></div>    </div><noscript><img src="https://login.wikimedia.org/wiki/Special:CentralAutoLogin/start?type=1x1" alt="" width="1" height="1" style="border: none; position: absolute;"></noscript> <div class="printfooter" data-nosnippet="">Retrieved from "<a dir="ltr" href="https://en.wikipedia.org/w/index.php?title=Squeeze_bore&oldid=1258554388">https://en.wikipedia.org/w/index.php?title=Squeeze_bore&oldid=1258554388</a>"</div></div> <div id="catlinks" class="catlinks" data-mw="interface"><div id="mw-normal-catlinks" class="mw-normal-catlinks"><a href="/wiki/Help:Category" title="Help:Category">Categories</a>: <ul><li><a href="/wiki/Category:Artillery_components" title="Category:Artillery components">Artillery components</a></li><li><a href="/wiki/Category:Firearm_components" title="Category:Firearm components">Firearm components</a></li></ul></div><div id="mw-hidden-catlinks" class="mw-hidden-catlinks mw-hidden-cats-hidden">Hidden categories: <ul><li><a href="/wiki/Category:CS1_Swedish-language_sources_(sv)" title="Category:CS1 Swedish-language sources (sv)">CS1 Swedish-language sources (sv)</a></li><li><a href="/wiki/Category:Articles_with_short_description" title="Category:Articles with short description">Articles with short description</a></li><li><a href="/wiki/Category:Short_description_matches_Wikidata" title="Category:Short description matches Wikidata">Short description matches Wikidata</a></li><li><a href="/wiki/Category:Pages_using_multiple_image_with_auto_scaled_images" title="Category:Pages using multiple image with auto scaled images">Pages using multiple image with auto scaled images</a></li></ul></div></div> </div> </main> </div> <div class="mw-footer-container"> <footer id="footer" class="mw-footer" > <ul id="footer-info"> <li id="footer-info-lastmod"> This page was last edited on 20 November 2024, at 09:42<span class="anonymous-show"> (UTC)</span>.</li> <li id="footer-info-copyright">Text is available under the <a href="/wiki/Wikipedia:Text_of_the_Creative_Commons_Attribution-ShareAlike_4.0_International_License" title="Wikipedia:Text of the Creative Commons Attribution-ShareAlike 4.0 International License">Creative Commons Attribution-ShareAlike 4.0 License</a>; additional terms may apply. By using this site, you agree to the <a href="https://foundation.wikimedia.org/wiki/Special:MyLanguage/Policy:Terms_of_Use" class="extiw" title="foundation:Special:MyLanguage/Policy:Terms of Use">Terms of Use</a> and <a href="https://foundation.wikimedia.org/wiki/Special:MyLanguage/Policy:Privacy_policy" class="extiw" title="foundation:Special:MyLanguage/Policy:Privacy policy">Privacy Policy</a>. Wikipedia® is a registered trademark of the <a rel="nofollow" class="external text" href="https://wikimediafoundation.org/">Wikimedia Foundation, Inc.</a>, a non-profit organization.</li> </ul> <ul id="footer-places"> <li id="footer-places-privacy"><a href="https://foundation.wikimedia.org/wiki/Special:MyLanguage/Policy:Privacy_policy">Privacy policy</a></li> <li id="footer-places-about"><a href="/wiki/Wikipedia:About">About Wikipedia</a></li> <li id="footer-places-disclaimers"><a href="/wiki/Wikipedia:General_disclaimer">Disclaimers</a></li> <li id="footer-places-contact"><a href="//en.wikipedia.org/wiki/Wikipedia:Contact_us">Contact Wikipedia</a></li> <li id="footer-places-wm-codeofconduct"><a href="https://foundation.wikimedia.org/wiki/Special:MyLanguage/Policy:Universal_Code_of_Conduct">Code of Conduct</a></li> <li id="footer-places-developers"><a href="https://developer.wikimedia.org">Developers</a></li> <li id="footer-places-statslink"><a href="https://stats.wikimedia.org/#/en.wikipedia.org">Statistics</a></li> <li id="footer-places-cookiestatement"><a href="https://foundation.wikimedia.org/wiki/Special:MyLanguage/Policy:Cookie_statement">Cookie statement</a></li> <li id="footer-places-mobileview"><a href="//en.m.wikipedia.org/w/index.php?title=Squeeze_bore&mobileaction=toggle_view_mobile" class="noprint stopMobileRedirectToggle">Mobile view</a></li> </ul> <ul id="footer-icons" class="noprint"> <li id="footer-copyrightico"><a href="https://wikimediafoundation.org/" class="cdx-button cdx-button--fake-button cdx-button--size-large cdx-button--fake-button--enabled"><img src="/static/images/footer/wikimedia-button.svg" width="84" height="29" alt="Wikimedia Foundation" loading="lazy"></a></li> <li id="footer-poweredbyico"><a href="https://www.mediawiki.org/" class="cdx-button cdx-button--fake-button cdx-button--size-large cdx-button--fake-button--enabled"><img src="/w/resources/assets/poweredby_mediawiki.svg" alt="Powered by MediaWiki" width="88" height="31" loading="lazy"></a></li> </ul> </footer> </div> </div> </div> <div class="vector-settings" id="p-dock-bottom"> <ul></ul> </div><script>(RLQ=window.RLQ||[]).push(function(){mw.config.set({"wgHostname":"mw-web.codfw.main-f69cdc8f6-7n487","wgBackendResponseTime":154,"wgPageParseReport":{"limitreport":{"cputime":"0.217","walltime":"0.266","ppvisitednodes":{"value":691,"limit":1000000},"postexpandincludesize":{"value":15542,"limit":2097152},"templateargumentsize":{"value":298,"limit":2097152},"expansiondepth":{"value":8,"limit":100},"expensivefunctioncount":{"value":3,"limit":500},"unstrip-depth":{"value":1,"limit":20},"unstrip-size":{"value":36181,"limit":5000000},"entityaccesscount":{"value":0,"limit":400},"timingprofile":["100.00% 238.498 1 -total"," 50.86% 121.310 1 Template:Reflist"," 33.32% 79.460 1 Template:Cite_journal"," 25.82% 61.578 1 Template:Short_description"," 14.70% 35.053 2 Template:Pagetype"," 10.39% 24.784 7 Template:Cite_web"," 8.81% 21.019 1 Template:Convert"," 7.43% 17.729 1 Template:Multiple_image"," 6.76% 16.134 3 Template:Main_other"," 6.05% 14.435 1 Template:SDcat"]},"scribunto":{"limitreport-timeusage":{"value":"0.130","limit":"10.000"},"limitreport-memusage":{"value":6833332,"limit":52428800}},"cachereport":{"origin":"mw-web.codfw.main-f69cdc8f6-z2b79","timestamp":"20241122161151","ttl":2592000,"transientcontent":false}}});});</script> <script type="application/ld+json">{"@context":"https:\/\/schema.org","@type":"Article","name":"Squeeze bore","url":"https:\/\/en.wikipedia.org\/wiki\/Squeeze_bore","sameAs":"http:\/\/www.wikidata.org\/entity\/Q11301631","mainEntity":"http:\/\/www.wikidata.org\/entity\/Q11301631","author":{"@type":"Organization","name":"Contributors to Wikimedia projects"},"publisher":{"@type":"Organization","name":"Wikimedia Foundation, Inc.","logo":{"@type":"ImageObject","url":"https:\/\/www.wikimedia.org\/static\/images\/wmf-hor-googpub.png"}},"datePublished":"2009-06-17T19:08:28Z","dateModified":"2024-11-20T09:42:08Z","image":"https:\/\/upload.wikimedia.org\/wikipedia\/commons\/1\/17\/75_mm_PaK_41fort_nelson2010.JPG","headline":"Weapon type"}</script> </body> </html>