Remington Core-Lokt Copper .243 Winchester 85 Grain Rifle Ammo now features a lead-free, all copper bullet. Remington Builds Core-Lokt ammo with high-strength copper and rigid construction. Receive dependable expansion, maintain weight retention, and win with great accuracy. Reliable brass, powders, and precision-loaded manufacturing techniques provide a consistent shooting experience. Lead-free copper bullet Dependable expansion Great weight retention Reliable brass and powders Great accuracy