Recapping this stuff... with the 69gr RMRs, we started out 3/10s under max, and had modest velocities right? So I bumped up to Max and shot some more last weekend... no problems. So I loaded hundreds of rounds of the same load and yesterday primers were popping like crazy.
So sick of popping primers.
What rifle are you shooting these in?
Remingtons have a large firing pin, even in the 223. I have to be careful when I load and not go near max or the primers start to really crater.
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