Hevi-Shot Hevi-Hammer 20 Gauge 3in #3 1oz Waterfowl Shotshells - 25 Rounds - At HEVI-Shot, they've always been about density. Density is the secret sauce. It leads to tighter patterns, higher speeds, and more knockdown power. In short, it increases your chance of success in the field. At HEVI-Shot, they're constantly searching for ways for hunters to get an edge without breaking the bank. Their latest innovation? Bismuth. They're now casting bismuth pellets in their foundry alongside their tungsten pellets.