US Cartridge's 300 Blackout 220-grain subsonic FMJ ammo is built for shooters who need reliability consistency and quiet performance. Designed for suppressed shooting these rounds stay below the sound barrier at 1015 fps eliminating the supersonic crack that comes with standard rifle ammo. The result is a much quieter shot when paired with a suppressor making it ideal for tactical use hunting or discreet training.Unlike lighter supersonic loads the 220-grain full metal jacket bullet maintains momentum at subsonic speeds providing stable flight and smooth cycling in semi-automatic platforms. Each round is loaded into high-quality newly manufactured brass casings ensuring reliable chambering clean extraction and reloadability for those who prefer to reuse their brass. With a bulk pack of 200 rounds this ammo offers extended range time without the hassle of frequent reloads making it a practical choice for subsonic applications.200-round bulk pack for extended training and suppressed shooting220-grain full metal jacket for reliable function and accuracyNewly-made brass casings ensure smooth feeding and easy extractionSubsonic velocity of 1015 fps eliminates the supersonic crack for reduced noise503 ft-lbs of energy provides controlled impact for close-range useBuilt for suppressed performance this subsonic load combines clean reliable cycling with quiet operation. Whether you're running drills hunting in sensitive areas or fine-tuning your suppressed rifle US Cartridge delivers the consistency and dependability you need for effective subsonic shooting.Need any mags? Click here to browse our selection of 300 Blackout magazines!Looking for additional shooting accessories? Click here to browse through gun cleaning products oils and eye and ear protection!