I bagged 7 mallards with one shot back in North Dakota in the fall of 1977. They were on the water and as I snuck up on them through the cattails; I just waited until they swam together and pulled the trigger. 2 were still swimming around in circles and needed a kill shot but when the smoke cleared, I had a lot of ducks to clean. You all know what a shotgun pattern looks like on the water, so you know its possible. 12 gauge Rossi overland with 28 in. tubes.