We use steel, in larger shot sizes for ducks and geese than we used with lead, and we have moved to 3" and 3 1/2" shells. (I actually set aside my SxSs and bought a pump because it handled 3 1/2".) I just bought some sample Kent shells which are "tungsten matrix", went on a goose hunt this morning, but could not bring myself to use them, the geese were coming in close.

I used to see people sky bust with lead and wound ducks that we all could see were clearly too far away; with steel it is much easier to shoot at something that is out of killing range, so the net result is more wounding.

It would be nice if the $2 US price for each tungsten matrix shell came down some.