IIRC, the Lee Site has updated the checklist about which primers are Alright to employ. They now seem to solitary out FEDERAL specially: Or, acquire it to a gunsmith for maintenance. You did not say no matter if it misfired on manufacturing facility ammo or handloads. If It is handloads, https://federallargeriflebenchres42861.luwebs.com/32463662/federal-215-gold-medal-match-primers-an-overview