I just splurged this fall to buy some Hevi-shot. I have not tried the other steel alternatives, but I can testify to the Remington Hevi-shot. I shot a duck at 40+ yards yesterday with #4 2 3/4" Heavy-shot and the duck folded on the first shot! I could not believe it. I have never had this kind of drop using steel. For the money and the number of shots I get, I am a changed man. Hevi-shot all of the way!

Good Luck with the Duck!