Re: M121 with barrel bulged...
Thanks for all your replies!!!
I finally had a chance to get out and fire it last w/e and it does seem to shoot just fine. I didn't take the time yet to test to see what ammo it might prefer, but I was getting about 2 1/2" offhand at 40 yards or so with thunderbolts. So, I'm pleased with that for now.
I've never had a ringed bbl before ( and the seller in this online auction FORGOT to mention it ) but it really doesn't seem to matter on this one.
THANKS again, Glenn