I recommend the 2 3/4" rounds personally also. The recoil on a 3" round in a light weight shotgun is enough to hurt the shooter. I was shooting 3", 12 pellet 00buck from my Mossy and it was recoiling harder than any gun I own. I have some honest cannon grade rifles and found the recoil very unpleasant. Edit, found the box. It was 12 pellet, not 15.