The Sellier & Bellot Rifle Ammo 300 Blackout 124 gr FMJ offers shooters a reliable training and target shooting option from a long-established ammunition line, with the 124 grain full metal jacket bullet providing consistent ballistics and feed reliability for subsonic and supersonic 300 AAC Blackout platforms. With a muzzle velocity around 2165 fps and muzzle energy near 1291 ftlbs in typical barrels, this 300 Blackout load delivers predictable trajectories and point-of-impact consistency that help ranges and competitors work on fundamentals and sighting-in drills. The brass casing and brass-colored finish ensure dependable extraction and reloadability for handloaders who track case life, while the HazAir designation makes range storage and transport more convenient for organized facilities. Originating from Sellier & Bellots Brazil production, this round complements AR-15 variants and bolt guns chambered for 7.62x35mm, giving coaches, shooting instructors, and recreational marksmen a cost-effective FMJ option for repetitive live-fire practice. If you want a straightforward 300 Blackout FMJ offering from a reputable manufacturer for training, target work, and general range use, this Sellier & Bellot 124 gr load fills that role.