Hi guys ,I just got back from picking up the ball tearing beasty ( 12 Bore Tolly )!
The chambers look much longer than 3in ,a 3 1/2 shot gun shell fits with ease .
Does any one have any load info on 3in+ 12 bore rifle loads . even bullet weight info ,as there is no info on the rifle ,was re proofed for 3in nitro superior proof load ,I have no idea what this is.

Thanks guys !