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Message: <blockquote data-quote="Larry Morgan" data-source="post: 2853407" data-attributes="member: 4676"><p>Primer cratering isn't a super reliable "pressure sign". It is highly dependent on primer hardness and the diameter of firing pin / firing pin hole. If you see what you think is flattening or cratering, by all means DON'T IGNORE IT. However, it must analyzed considering all the factors. In my pet load for .223, it forms just the slightest ridge that I can catch with my nail. However, bolt lift is fine, brass life hasn't suffered, and I haven't seen anything otherwise that would make me nervous. There have even been cases of people puncturing primers at modest loads in certain chamberings. The fix is usually a smaller firing pin and a bushed bolt.</p></blockquote><p></p>