tky, stay away from steel if you’re shooting with a full choke. You will definitely damage your barrel. I’ve used #4 lead for years on both ducks and geese and have been very successful and both 2-3/4” or 3” shells..We now have to use steel shot in our province so I’ve switched to #2 shot. I don’t do as much hunting as I used to but #2 should work pretty good. Good luck....