Typical pistol primers will start to flatten at about 20~30k psi, based on brand name and magnum as opposed to conventional. Thinking about a 9mm can run as higher as 35k psi for usual loads and as many as 38,500 psi for 9mm +P, there is not any question . https://elliotmmjcv.blogerus.com/54303124/fascination-about-federal-215m-primers-in-stock