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Bart B. · November 19, 2019, 08:52 AM

What's the primer cup edge radius minimum that is the standard to define a flattened primer?

Is it the same for all primers regardless of cup metal properties and dimensions?

I've shot 7.62 NATO proof loads at about 81,000 psi (67,500 cup) and most people looking at the fired case heads and primers say they're a normal maximum load.

November 19, 2019, 08:52 AM	#6
Bart B. Senior Member Join Date: February 15, 2009 Posts: 8,927	What's the primer cup edge radius minimum that is the standard to define a flattened primer? Is it the same for all primers regardless of cup metal properties and dimensions? I've shot 7.62 NATO proof loads at about 81,000 psi (67,500 cup) and most people looking at the fired case heads and primers say they're a normal maximum load. Last edited by Bart B.; November 19, 2019 at 08:59 AM.