One other question is what range are you shooting?
I have not used a 3 1/2" load in quite some time, even during conservation season.
When I patterned my Maxus, the #3 & #4 1450fps loads were phenomenal with I/C, L/M and Mod, and L/M stayed in the gun the majority of the time. I put 177 ducks in the bag last season. If this were me, I would buy the 3" 1450fps loads and the same 3 1/2" 1450fps loads and compare them, not only patterns but recoil and I think you will be surprised.
NRA Life Member