I came across this issue last weekend while shooting a 7 - 08. Things I look for in load development are as follows: Primer flattening and cratering Sticky bolt lift on up cycle and recycle Extractor hole mark/ring Some times I have seen primer issues without the rest of the signs and don't get all worked up over it. Well, unless the primer is just hammered by pressure. I tend to get much more concerned when I see extractor marks and bolt lift issues. So, the issue came when I shot some PPU ammo. A little cratering, no bolt lift issue, but I did see and extractor ring mark. At max grains of 4064 I did not see signs on this PPU brass. I think I can go up 1 grain more but have not tested it yet. I don't recall ever seeing extractor marks on factory ammo. Is this common? Am I reading too much into it?