8.6 Blackout was engineered to bring .338-caliber power to short-barreled, suppressed rifles, requiring only a barrel swap on standard .308/6.5 CM platforms and fitting factory magazines. Its heavy subsonic loads (250–300 gr) run quietly through fast-twist barrels for deep penetration on deer, hogs and even elk in noise-sensitive areas, while lighter supersonic offerings extend effective reach without extra recoil. Monolithic copper and bonded bullets stabilize reliably at 1:3 twist rates, delivering controlled expansion on medium and large game. At Sportsman’s Outdoor Superstore, you’ll find both subsonic and supersonic 8.6 Blackout rounds—compare projectile profiles, secure your in-stock cartridges online with competitive pricing, and enjoy fast shipping with every order.