We shoot ducks, nearly all mallards, exclusively with 20 & 28 gauges. While we often use steel in the 20’s, Hevi-Metal shot shells really are superior. I like 4’s in a 3” load and they work great. In the 28 gauge, I prefer 4’s in Hevi-X shotshells. We also shoot Hevi-X 6’s in the 28’s, but 4’s seem to kill birds more efficiently. We are typically shooting decoying mallards at 15-25 yards and the smaller gauges work fine.
