Hevi-Shot Defense Hevi-Duty 12 Gauge #4 Ammunition is designed with home defense in mind. HEVI-Duty® is safer to use in situations where you want to minimize wall penetration from misaimed pellets. Hevi-Shot Defense Hevi-Duty 12Ga Ammunition in 2-3/4" length features 1250 fps and 30 pellet charge weight. The pellets are frangible yet pattern better than lead buckshot, with similar lethality. We hope you never have to use it but if you do you can use it with confidence. This is how a home defense load should be built.