SCAMMER Sep 22, 2019 #4 Remember the fact that primer cup hardness isn't the only probable problem. When there is a lot of slop round the firing pin inside the bolt confront you are able to incredibly very easily get primer cratering That could be a false optimistic for pressure https://cci-300-z-ndh-tchen-large73950.tblogz.com/not-known-details-about-cci-35-45439321