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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
6.5 SS Sherman Short Headspace Concerns
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<blockquote data-quote="J_D_ELR" data-source="post: 2958388" data-attributes="member: 127924"><p>I just measured this again this morning. checked a few fired unsized cases for baseline of the chamber.</p><p></p><p>In the comparator, set that to zero, and the new virgin brass was -.0120 shorter from the shoulder and same -.0120 for the go gauge.</p><p></p><p>The assumption is the case is stretching 12 thou, but I'm going to pull the bolt again later, without the ejector and firing pin and put a tape over the end of the go gauge to see if it really is headspace.</p><p></p><p>Fired brass......</p><p></p><p>[ATTACH]515152[/ATTACH]</p><p></p><p>Virgin Brass......</p><p></p><p>[ATTACH]515151[/ATTACH]</p><p></p><p>Go Gauge.....</p><p></p><p>[ATTACH]515153[/ATTACH]</p><p></p><p>sized and bumped brass at 3 thou.</p><p></p><p>[ATTACH]515154[/ATTACH]</p><p></p><p>is 12 thou normal stretching for these cases?</p></blockquote><p></p>
[QUOTE="J_D_ELR, post: 2958388, member: 127924"] I just measured this again this morning. checked a few fired unsized cases for baseline of the chamber. In the comparator, set that to zero, and the new virgin brass was -.0120 shorter from the shoulder and same -.0120 for the go gauge. The assumption is the case is stretching 12 thou, but I'm going to pull the bolt again later, without the ejector and firing pin and put a tape over the end of the go gauge to see if it really is headspace. Fired brass...... [ATTACH]515152[/ATTACH] Virgin Brass...... [ATTACH]515151[/ATTACH] Go Gauge..... [ATTACH]515153[/ATTACH] sized and bumped brass at 3 thou. [ATTACH]515154[/ATTACH] is 12 thou normal stretching for these cases? [/QUOTE]
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6.5 SS Sherman Short Headspace Concerns
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