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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Overpressure and case head growth
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<blockquote data-quote="Mikecr" data-source="post: 2977566" data-attributes="member: 1521"><p>He's talking about testing for case head expansion that leads to shorter primer pocket life. There are similar tests where measure is compared at the extraction groove, and another at the fired web-line.</p><p>He points out that pressure measuring equipment is not actually a final say in this.</p><p>And he points out that brass that has yielded, will go right back there (sizing doesn't matter to this).</p><p></p><p>The useful information is locally measured, and it does not indicate pressure, it's not how to measure pressure, but it can indicate YOUR max load (reloading-wise). People who want their brass to last, measure this stuff. They also look for hard brass alloys, stronger breaches, and lower clearances.</p></blockquote><p></p>
[QUOTE="Mikecr, post: 2977566, member: 1521"] He's talking about testing for case head expansion that leads to shorter primer pocket life. There are similar tests where measure is compared at the extraction groove, and another at the fired web-line. He points out that pressure measuring equipment is not actually a final say in this. And he points out that brass that has yielded, will go right back there (sizing doesn't matter to this). The useful information is locally measured, and it does not indicate pressure, it's not how to measure pressure, but it can indicate YOUR max load (reloading-wise). People who want their brass to last, measure this stuff. They also look for hard brass alloys, stronger breaches, and lower clearances. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
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Overpressure and case head growth
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