I agree bad primers I run this load in multiple guns and it works fine. It only happened one time with that particular batch of ammo. Sent from my SM-G960U using Tapatalk
Atlas custom open gun 9mm major. 6.5 gr WAC 1.61 oal Federal small rifle primers. Same load I have ran for years in my other open gun no issues. Best guess is a bad batch of primers Sent from my SM-G960U using Tapatalk