Regular pistol primers will start to flatten at about 20~30k psi, based on manufacturer and magnum compared to conventional. Taking into consideration a 9mm can run as large as 35k psi for typical loads and as much as 38,500 psi for 9mm +P, there's no question . Increase to estimate https://federal-ammunition-primer35678.theblogfairy.com/31198868/examine-this-report-on-federal-primers-209