The Sellier & Bellot .300 AAC Blackout FMJ 124 gr (20 Rounds) is a factory-loaded supersonic rifle cartridge engineered for target shooting, range practice, and tactical drills. Built with a 124-grain (8.00-gram) Full Metal Jacket projectile featuring a lead core and a non-magnetic CuZn 10 (tombac) jacket, this ammunition ensures reliable feed geometry and positive cycling in both bolt-action and semi-automatic platforms. Tested from a 406 mm (16-inch) barrel, it delivers a muzzle velocity of 660 m/s (2,165 fps) and a muzzle energy of 1,742 J (1,291 ft·lb), maintaining supersonic performance beyond 400 metres with standard boxer-primed, reloadable brass casings.

Key Features

• Supersonic Ballistic Performance: Propels a 124 gr bullet at 2,165 fps (660 m/s) with 1,291 ft·lb (1,742 J) of muzzle energy from a 16-inch test barrel.
• Quality Non-Magnetic Projectile: Constructed with a lead core enclosed in a CuZn 10 tombac jacket, achieving a sectional density of 0.187 lb/in² and ballistic coefficients of G1: 0.379 and G7: 0.191.
• Factory Trajectory Retention: Retains supersonic velocity through 400 metres (405 m/s), exhibiting -23.2 cm drop at 200 m, -82.2 cm at 300 m, and -187.3 cm at 400 m from a 100-metre zero.
• Reloadable Components: Assembled in standard reloadable brass cases fitted with non-corrosive Boxer primers for dependable ignition.
• Australian Regulatory Compliance: Requires a valid firearms licence endorsed for .300 AAC Blackout, subject to state and territory firearms and dangerous goods storage regulations.

Specifications

• Calibre: .300 AAC Blackout (7.62×35mm)
• Bullet Weight: 124 grains (8.00 grams)
• Bullet Type: Full Metal Jacket (FMJ), non-magnetic tombac jacket
• Muzzle Velocity: 660 m/s (2,165 fps)
• Muzzle Energy: 1,742 J (1,291 ft·lb)
• Ballistic Coefficient: G1: 0.379 / G7: 0.191
• Sectional Density: 0.187 lb/in²
• Overall Cartridge Length: 55.00 mm (2.165 inches)
• Total Cartridge Weight: 15.5 grams
• Case / Primer Type: Brass / Non-corrosive Boxer
• Package Quantity: 20 rounds per box

Who is the Sellier & Bellot .300 AAC Blackout 124 Grain FMJ Ammo for?

• Range training and tactical practice shooters — delivers positive cycling and clean chambering across high-volume drills with a consistent muzzle energy of 1,291 ft·lb from factory 124-grain .300 AAC Blackout rifle ammunition.
• Supersonic zeroing and general firearms practice — provides predictable external ballistics optimized for a factory Most Recommended Distance zero of 135 metres, allowing accurate optical alignment before engaging mid-range targets with this .300 AAC Blackout rifle ammunition.
• Match and competition target shooters — produces flat-shooting supersonic flight from a high-velocity 2,165 fps launch, maintaining bullet stability out past 400 metres in precision events that permit non-expanding .300 AAC Blackout FMJ projectiles.

Less suitable for: Ethical medium game hunting requiring controlled-expansion terminal performance (such as soft-point or monolithic copper hunting rounds), maximum sound suppression tasks requiring heavy subsonic ammunition running at approximately 323 m/s, or rifles chambered in standard 5.56 NATO/.223 Remington.