I usually just use federal game shok 23/4 11/8th oz shells at 1290 fps for bird hunting. I recently tried some rio high velocity 11/4oz rated at 1330 fps. The difference in recoil and report was actually quite a bit more than I expected. My dad asked me what I was using because to him it sounded like a propane cannon vs the usual bark. I thought it might gain me an edge over the standard but after a box of each the standards brought down more birds round per round than the hv. Would they be more useful in water fowl than small birds?