Federal Premium is quality hunting ammunition designed for maximum performance and reliability. Premium hunting bullets are matched with select powders, primers and brass to create a reliable, hard-hitting hunting cartridge. This ammunition is new production, non-corrosive, in boxer primed, reloadable cases. Barnes Triple Shock X 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. FeaturesOne-piece copper constructionDeep hollow-point tipGrooved bullet shank improves accuracyAlmost 100 percent weight retentionDeep penetration and large, consistent expansion