HEVI-Hammer has 15% high density bismuth, layered over 85% steel pellets. The Bismuth layer is the same shot size as the steel. That small but mighty leading edge of bismuth packs nearly 50% more knockdown power than the steel layer at 40 yards.
Hevi-Shot Metal Xtreme Shotgun Ammunition for General, 20 Gauge, 25
$50.48 
Hevi-Shot Hevi XII Density Shotgun Ammunition for Waterfowl, 12 Gauge, 25
$85.74
Hevi-Shot Hammer Upland Shotgun Ammunition, 20 Gauge, 25
$32.12
