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Rifles, Reloading, Optics, Equipment
Reloading
Simple one for you pros...
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<blockquote data-quote="gohring3006" data-source="post: 1428102" data-attributes="member: 78762"><p>Primers are not a good indicator for pressure.</p><p>Especially in new brass.</p><p></p><p>When you have sloppy new brass, and you fire, the firing pin pushes the sloppy case forward, the pressure can shove the primer out of the pocket, then the case head comes slamming back against the boltface, and that partially ejected primer gets flattened in the process.</p><p>I watch for ejector marks with a proven chronograph.</p><p>If your velocity is higher than book max, and you have a ejector swipe, then you are over pressure.</p><p>If I'm able to load at the range, I just use one piece of brass over and over once I find a good load, and I'll fire it several times to see if my primer pocket open up prematurely. Like 6-7 firings or less.</p></blockquote><p></p>
[QUOTE="gohring3006, post: 1428102, member: 78762"] Primers are not a good indicator for pressure. Especially in new brass. When you have sloppy new brass, and you fire, the firing pin pushes the sloppy case forward, the pressure can shove the primer out of the pocket, then the case head comes slamming back against the boltface, and that partially ejected primer gets flattened in the process. I watch for ejector marks with a proven chronograph. If your velocity is higher than book max, and you have a ejector swipe, then you are over pressure. If I’m able to load at the range, I just use one piece of brass over and over once I find a good load, and I’ll fire it several times to see if my primer pocket open up prematurely. Like 6-7 firings or less. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
Simple one for you pros...
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