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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
go - nogo primer pocket pressure gauges
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<blockquote data-quote="ricka0" data-source="post: 76308" data-attributes="member: 3086"><p>Altho Case Head expansion (CHE) has been considered the best approach to measure excessive pressure - The physicist/statistician Denton Branwell has demonstrated that <a href="http://www.shootingsoftware.com/ftp/dbramwell%20july%2019%2004.pdf" target="_blank">CHE cannot be used to measure over pressure.</a> ( Even with my exceptional Mitutoyo .0001 blade <em>Mike</em> )</p><p></p><p>On my RUM brass, the primer pocket radius grows about 3x as much as the Case Head - so primer pocket radius is a more sensitive indicator. (it's probably also more uniform)</p><p></p><p>Suppose I take my preped (uniform the primer radius) brass and have a machinist make me some <strong><font color="brown">go, go with force /ubbthreads/images/graemlins/cool.gif , no-go gauges </strong></font> to slip into the primer pocket. I would have a fast way to measure primer pocket expansion.</p><p></p><p>I would like to use this approach in conjunction with the RSI <a href="http://www.shootingsoftware.com/pressure.htm" target="_blank">rsi pressure trace</a> system. (also using factory ammo as a reality check).</p><p></p><p>When I get a Allen uber Mag, I won't have the luxury of factory ammo.</p><p>comments, suggestions, idea please.</p></blockquote><p></p>
[QUOTE="ricka0, post: 76308, member: 3086"] Altho Case Head expansion (CHE) has been considered the best approach to measure excessive pressure - The physicist/statistician Denton Branwell has demonstrated that [url="http://www.shootingsoftware.com/ftp/dbramwell%20july%2019%2004.pdf"]CHE cannot be used to measure over pressure.[/url] ( Even with my exceptional Mitutoyo .0001 blade [i]Mike[/i] ) On my RUM brass, the primer pocket radius grows about 3x as much as the Case Head - so primer pocket radius is a more sensitive indicator. (it's probably also more uniform) Suppose I take my preped (uniform the primer radius) brass and have a machinist make me some [b]<font color="brown">go, go with force [img]/ubbthreads/images/graemlins/cool.gif[/img] , no-go gauges [/b]</font> to slip into the primer pocket. I would have a fast way to measure primer pocket expansion. I would like to use this approach in conjunction with the RSI [url="http://www.shootingsoftware.com/pressure.htm"]rsi pressure trace[/url] system. (also using factory ammo as a reality check). When I get a Allen uber Mag, I won't have the luxury of factory ammo. comments, suggestions, idea please. [/QUOTE]
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go - nogo primer pocket pressure gauges
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