6mm ARC Bulk Ammo: Best Loads for AR-15 Precision & Hunting 6mm ARC bulk ammo is built for shooters who want better long-range performance from the AR-15 platform without moving to a heavier AR-10 rifle. The 6mm Advanced Rifle Cartridge gives AR-15 owners a flatter-shooting, higher-BC option for precision shooting, competition, and deer hunting […]