Faststeel outpreforms all other shells that I've shot through my SBEII. For ducks I use 3" #4 shot and for geese I shoot 3.5" bb. I have killed ducks from +/- 50 yards a time or two with them, and have killed a lot of waterfowl with them at closer range. I've tried Black cloud, hevi-steel, Xpert, and others, but Faststeel works best for me and my SBEII.