Snow geese tend to be more fragile than the giant Canada geese and white-fronted geese. Most snow goose hunters rarely go heavier than size BB steel shot, and many will use size 1 steel shot, and even size 2 steel. Size BB does give a little more punch at the outer reach of your shotgun’s range, which can be beneficial for more wary late season birds that don’t want to commit. The heavier nature of Bismuth and tungsten loads will allow you to put more pellets on target with size 2 up to size 4 shot, but snow goose hunters rarely choose these non-steel nontoxic loads because of the price the shells command and the amount of shots a hunter can take in a good day chasing spring snowstorms.