Common pistol primers will begin to flatten at about twenty~30k psi, determined by brand and magnum vs . typical. Considering a 9mm can run as large as 35k psi for typical hundreds and nearly 38,five hundred psi for 9mm +P, there is no doubt . Add to quote Only display https://winchester-primers-uk24567.blogrelation.com/37982354/federal-primers-for-9mm-things-to-know-before-you-buy