This depends on several variables, including the ducks themselves—small (teal); medium (wood ducks or widgeon); or big (mallards or black ducks)—and the distances you’re going to be shooting, such as 25 yards over decoys or pass shooting at 45 yards. Steel shot selection, then, may range from #6 or #7 for teal to #1 or #2 for something like sea ducks or tough divers.