HEVI-Shot’s HEVI-Steel ammunition was designed to offer an affordable, non-toxic shotshell for the hunters who go out every day of the season, but still demand quality ammunition.? Hevi-Steel still offers the Waterproof crimp hunters have come to expect from all Hevi-Shot products, but the pellets are formed of non-corrosive steel instead of the proprietary tungsten blend in order to keep cost down.