300 Blackout vs 308: Why Purpose Matters 300 Blackout vs 308 is not a simple “which one is better” debate. Both cartridges use .30-caliber bullets, but they are built for very different rifle roles. The 300 AAC Blackout is designed around the AR-15 platform, short barrels, heavier bullets, and suppressed-use potential where legal. The .308 […]