Quote:
My standard test load was 66k psi Quickload, because that was all the
powder that would fit. Brass went 25 firings and never got loose primers
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Interesting. My experience has been the opposite. In fact I once got wound up w/ 2495 substituted for 2520 and immediately blew out primers in the first two shots; expanded the primer pockets to where they looked like the bore of my 45ACP (
); and extruded the most memorable ejector cutout imprints (actually a huge bas relief scultures worthy of Michaelangelo) I have ever seen.
Quickload calculated the after-action pressures at 77-78ksi, and I wrote a nice letter to Colt complementing them on their receiver strength. I would advise most shooters not to get within 10k of those pressures under any corcumstance.
As to 55+ and up eventually causing loose pockets in an entire case group (at least in Win brass), that's also my experience.
YMMV -- of course,