NOT KNOWN FACTS ABOUT MOSSBERG 590A1 TACTICAL STOCK

Squib308 mentioned: agree sounds like an ammo situation. perhaps the brass is bulging? Have you ever inspected the winchester brass right before vs. right after firing?That cutout is where the locking lug about the bolt human body locks into. Should you look just forward of that cutout, the extention is somewhat ramped to guide the shell into the c