Conventional pistol primers will begin to flatten at about 20~30k psi, dependant upon manufacturer and magnum as opposed to regular. Looking at a 9mm can run as high as 35k psi for typical masses and approximately 38,500 psi for 9mm +P, there isn't any question . 223 Rem. They encouraged https://milokxjwg.wssblogs.com/31881648/federal-215-gold-medal-match-primers-an-overview