I load 1 3/8's because it fills the shot cup [25 shells + -] Get a roll crimping tool that fits in a battery operated drill and you can mark your shells with load and shot size. Don't want to shoot a box of nontoxic at crows, right Scott
Yes on the water fowl, that's all I use it for. It is pricey but when you get that ten dialed in, it will amaze you.