If you try the B & P Comp Ones you'd better have loads of extra firing pin protrusion, or they will misfire. I've got lots of guns, vintage and modern, they will not shoot reliably in. Smaller diameter heads than most other shells.
SRH
Are you talking 12ga, Stan? I've only shot them in a couple of different 28ga guns. Zero issues. A guy who likely kills more grouse than anyone I know also uses them in his 28ga and recommends them highly. I've never used them in 12ga, but appreciate the warning if that's where you've had problems.
