Squib308 stated: concur sounds like an ammo situation. Probably the brass is bulging? have you inspected the winchester brass just before vs. just after firing? MGL Chapter a hundred and forty mentioned: “Substantial capacity weapon”, any firearm, rifle or shotgun: (i) that is certainly semiautomatic with a hard and fast https://highimpactrounds.com/product/mossberg-590a1-tactical-12-ga-20in-8rd/