i would reccommend first of all going and getting a recoil pad if recoil is that bad of an issue for you, second i would reccommend only using 2 3/4 or 3 in. depending on what gauge you have, you can get 2 3/4 in copper plated #4's from federal. they come in Phesants forever boxes, and they arent that expensive.

remington also sells copper plated #4's in 2 3/4 for 12 and 20 ga.