Designed for .44 Remington Magnum .454 Casull 45-70 Government and .500 Smith & Wesson cartridges Barnes Buster Bullets are an unstoppable force. These fully casted bullets are ready to fire intended for big game hunting including wild boar bear buffalo bison moose and other large dangerous animals. With a thick copper jacked coupled with a heavy load core the bullets can penetrate deep and produce maximum weight retention. For premier hunting these bullets boast bone-crushing force with pass-through penetration but also track straight without any deflection unlike other expanding bullets.