Common pistol primers will begin to flatten at about 20~30k psi, according to brand and magnum as opposed to regular. Considering a 9mm can run as significant as 35k psi for usual masses and up to 38,500 psi for 9mm +P, there is not any question . For an illustration https://landenvkyig.blog-mall.com/32418538/5-easy-facts-about-federal-primers-ammunition-described