It would have to be the 3 1/2" 12 gauge. Noticeably worse than a either of the 10 gauges I have.

To be honest, I got rid of the 3 1/2" chambered 12. I couldn't really see that it provided me with any advantage. Especially being that it punished me all the way around...that is, not only in terms of recoil, but cost of ammunition. I have no regrets, there has NOT been one hunt since where I have wished I had that 3 1/2" shooting gun.