Hevi-Shot Hevi-Hammer Upland 12 Gauge 3in #5 1 1/8oz Upland Shotshells - Density is the secret sauce. It leads to tighter patterns, higher speeds and more knockdown power. In short, it increases the chance of success in the field. Their HEVI-Hammer has a 15% higher density bismuth (9.64g/cc) layered over 85% precision steel pellets. That small but mighty leading edge of bismuth packs nearly 50% more knockdown power than the steel layer at 40 yards. With their 9.64 g/cc Bismuth, you can generally shoot one shot size smaller than steel for the same lethality. HEVI-Hammer Upland is a superior non-toxic shotshell for areas where lead is prohibited or for environmental conscious hunters.