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Rifles, Reloading, Optics, Equipment
Reloading
300 Win Mag Headspace
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<blockquote data-quote="bigedp51" data-source="post: 1488942" data-attributes="member: 28965"><p>CatShooter</p><p></p><p>He didn't mean the case will stretch .014 to reach the bolt face. He meant the case shoulder was .014 short of touching the chambers shoulder and stretched forward.</p><p></p><p>Example below of a new rimmed .303 British case in a Willson case gauge and its short shoulder location.</p><p></p><p><img src="https://i.imgur.com/RBeuevm.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p><p></p><p>And now a fired case in the Wilson gauge, the amount the case is sticking above the gauge is where the chambers shoulder actually is. Again rimmed and belted cases date from the late 1800s when the forward part of the case was not critical.</p><p></p><p><img src="https://i.imgur.com/HrqwFOG.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p><p></p><p>Below a brand new Remington .303 British with a short shoulder location on the left. And on the far right the effects of full length resizing with .009 head clearance and a case fired three times.</p><p></p><p><img src="https://i.imgur.com/NHlR9jO.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p><p></p><p>I know the post is about a belted case but I do not have any belted case photos, but the rimmed and belted cases have the same basic problem. They both need to headspace off the shoulder and not the rim or belt to prevent case stretch.</p><p></p><p>Nice to hear from you again CatShooter you old (expletive deleted) <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite8" alt=":D" title="Big Grin :D" loading="lazy" data-shortname=":D" /></p></blockquote><p></p>
[QUOTE="bigedp51, post: 1488942, member: 28965"] CatShooter He didn't mean the case will stretch .014 to reach the bolt face. He meant the case shoulder was .014 short of touching the chambers shoulder and stretched forward. Example below of a new rimmed .303 British case in a Willson case gauge and its short shoulder location. [IMG]https://i.imgur.com/RBeuevm.jpg[/IMG] And now a fired case in the Wilson gauge, the amount the case is sticking above the gauge is where the chambers shoulder actually is. Again rimmed and belted cases date from the late 1800s when the forward part of the case was not critical. [IMG]https://i.imgur.com/HrqwFOG.jpg[/IMG] Below a brand new Remington .303 British with a short shoulder location on the left. And on the far right the effects of full length resizing with .009 head clearance and a case fired three times. [IMG]https://i.imgur.com/NHlR9jO.jpg[/IMG] I know the post is about a belted case but I do not have any belted case photos, but the rimmed and belted cases have the same basic problem. They both need to headspace off the shoulder and not the rim or belt to prevent case stretch. Nice to hear from you again CatShooter you old (expletive deleted) :D [/QUOTE]
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300 Win Mag Headspace
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