Remington Core-Lokt Copper is breaking through challenging big game with authority. Engineered for serious hunters who need a round that's not afraid of tough, dense, big game, Core-Lokt Copper is a top choice. Loaded with a monolithic copper bullet, this ammunition delivers deep penetration, the highest weight retention, and iconic Core-Lokt performance. Additionally, the copper bullet helps minimize barrel fouling, ensuring a cleaner shooting experience and helping your bullet hit the mark shot after shot.