WSM
Rugeritis
I think a lot of the soreness comes from my impressive man boobs and the heel of the stock getting kicked into some really soft tissue. I used to shoot my uncle's 3 1/2 mag 12 gauge for turkey and crows and I never had an issue with soreness. Granted I wasn't shooting 100 rounds off a skeet deck but I would definitely shoot around a box or two hunting crows and wouldn't have any issues, that was also 10 years and 75 lbs ago.