SBR was one of the first manufacturers to offer loaded ammunition for the exciting 458 Socom round, offering several different and potent loads for practice, hunting or defense. This round was designed for excellent performance on medium-sized game. Barnes Triple-Shock bullets are made of 100% copper and contain no lead. When the bullet expands, four razor-sharp cutting petals are created, allowing the bullet to penetrate farther through tough bone and tissue. These bullets usually retain 100% of their original weight, making them a superb choice for hunting. This ammunition is new production, non-corrosive, in boxer-primed, reloadable brass cases.