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What are signs of pressure for pistol cartridges? I know signs for rifle but what about reloading pistol cartridges?
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Joined: Dec 2010
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Campfire Regular
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most are the same as with rifle. primers flattening some, flow back around the firing pin indent, primer pocket expansion, and case head separation in worst case scenarios
Livin ain’t killed me yet, but it’s workin on it!
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Primer flow is an example of gross over-pressure. There really aren't any sure fire methods of determining the high end of safe pressure because most handguns operate at pressures well within the capabilities of brass casings. Also autoloaders often headspace by hanging on the extractor, so a flattened primer might not be telling you much.
My M&P has the best casehead support I've seen. I could run pressures high enough to loosen SP primers before the case would bulge. So I try to stick to published data.
Last edited by dla; 06/25/22.
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Campfire Tracker
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Yeah, with rifles the only way most of us can get a good idea of pressure is with with a chronograph or something like a Pressure Trace, all the other methods really don't tell you a lot except when you are way over.
I'd trust a $100 Pro Chrono far more than primer shape.
Or just stick with tested data.
'Four legs good, two legs baaaad."
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Campfire 'Bwana
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most are the same as with rifle. primers flattening some, flow back around the firing pin indent, primer pocket expansion, and case head separation in worst case scenarios Flow back can be caused by an oversized firing pin hole
I got banned on another web site for a debate that happened on this site. That's a first
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most are the same as with rifle. primers flattening some, flow back around the firing pin indent, primer pocket expansion, and case head separation in worst case scenarios Flow back can be caused by an oversized firing pin hole yessir, also true
Livin ain’t killed me yet, but it’s workin on it!
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