I dont know how it preforms on ducks and geese, too expencive for me to waste on these things. All I know is that last year when I was swan hunting i was shooting remington nitro in BBB 3 1/2 and all it was doing was slapping the heck out of them things and nothing falling out of the air! Usually you have to try to get the ones low enough and try to get a head/neck shot on them other wise it is pure luck when you bring them down. I was out with a friend and he handed me a couple of his 3 1/2 BB black cloud shells to try and the first shot, at a bird that was unbeleivably high, bird dropped like a ton of bricks! I was thinking of using that hevi shot or that dead coyote stuff this year but have bought a box of black cloud and am going to use it for swans.