This is .300 AAC BLACKOUT Remington Premier 125gr. Accutip Ammo. Remington's Accutip is the most accurate, polymer-tipped big-game bullet available today. Along with match-grade precision, it delivers an unprecedented combination of laser-flat trajectory and devastating terminal performance. Accutip bullets expand quickly – producing an awesome level of transferred energy – to dispatch medium and big game with lightning authority. A thicker jacket and harder lead core regulate weight retention and optimize penetration. This new production ammo is brass cased, boxer primed, and non corrosive. This ammo comes packed in 20rd. boxes.