Hevi-Shot Hevi-XII Ammunition is the original Hevi-Shot, now in a 25-round box. Introducing Hevi-XII. Shoot three shot sizes smaller than steel for the same lethality with 28% more tungsten pellets on target. The end result? More kills, fewer cripples, better stories. Pack Hevi-XII in and walk out carrying extra weight. FeaturesHEVI-XII is 12.0g/cc. 53.8% more dense than steelSmaller and more dense pellets penetrate deeperMore lethal pellets in a tighter pattern