jeff quinn told me to try pulling forward with the left hand and pulling back with the right sort of like you are trying to pull the shotgun in two. this with the right recoil pad works wonders. also consider tactical buckshot loads. these have a little less recoil that the standard hunting 00 buck loads.

as an aside, i was getting ready for turkey season and tried the 3.5" 2oz of number 5s. amazing recoil! too much for this wimp.