I like steel at 1,550fps in a 3" shell with 1 1/8oz of #2's for ducks and a 3 1/2" shell with 1 3/8oz of BB's for geese.

If you want to spend more, there is always the other non toxic loads like Bismuth, Kent Tungsten Matrix, Federal High Density, Hevi Shot, Winchester XD, Remington HD.