Normal pistol primers will start to flatten at about twenty~30k psi, according to brand name and magnum vs . standard. Thinking about a 9mm can run as significant as 35k psi for usual masses and up to 38,500 psi for 9mm +P, there is no question . I've been reloading https://paxtongcwxd.luwebs.com/32478262/examine-this-report-on-federal-215-primers-100-count