Standard pistol primers will start to flatten at about twenty~30k psi, based upon brand name and magnum as opposed to regular. Considering a 9mm can operate as large as 35k psi for usual loads and up to 38,500 psi for 9mm +P, there isn't any doubt . For an example https://winchester-41-small-rifle50606.wizzardsblog.com/31791853/5-essential-elements-for-federal-primers-small-pistol