I shoot Hevi-Metal 3" in both 12ga and 20ga with 2's. I back it up with BB's in Hevi-Metal as well. I normally shoot Hevi-Shot as the 3rd shot as back up only. If I am working with clients on geese, I will shoot Hevi-Shot 3" 4's for finishing off cripples before the dog gets there. Late season honkers get Hevi-Metal 3-1/2" B's.