The Sellier & Bellot .300 AAC Blackout FMJ Subsonic 200 Grain ammunition is engineered for consistent short-to-medium-range target shooting and range training. Utilizing a heavy 200 gr (13.00 g) Full Metal Jacket projectile seated in a reloadable factory brass casing, this factory load generates a muzzle velocity of 323 m/s (1,060 fps) and 678 J of muzzle energy out of a 410 mm test barrel. By staying below the speed of sound under standard atmospheric conditions, this round eliminates the supersonic ballistic crack, offering reduced recoil and quiet cycling in firearms chambered strictly in .300 AAC Blackout (7.62×35mm).

• True Subsonic Velocity: Operates at an initial muzzle velocity of 323 m/s, preventing supersonic shockwaves and ensuring suppressed or unsuppressed shooting remains quiet and manageable.
• Aerodynamic Heavy Projectile: Features a high G1 ballistic coefficient of 0.558 and a sectional density of 0.301 lb/in² for stable flight within standard operating ranges.
• Low-Fouling Components: Loaded with non-corrosive Boxer primers and CuZn 10 gilding metal-jacketed lead cores to minimise barrel leading and action fouling.
• Reloadable Brass Cases: Manufactured to standard overall cartridge lengths of 56.00 mm for reliable feeding across manual bolt-action and semi-automatic platforms.

Specifications

• Calibre: .300 AAC Blackout (7.62×35mm)
• Bullet Type: Full Metal Jacket (FMJ Subsonic)
• Bullet Weight: 200 gr (13.00 g)
• Muzzle Velocity: 323 m/s (1,060 fps from a 410 mm barrel)
• Muzzle Energy: 678 J (500 ft-lbs)
• Ballistic Coefficients: G1: 0.558 / G7: 0.242
• Sectional Density: 0.301 lb/in²
• Overall Cartridge Length: 56.00 mm (2.205 in)
• Total Cartridge Weight: 19.9 g
• Box Dimensions: 59 mm (L) × 103 mm (W) × 19 mm (H)
• Box Weight: 0.41 kg (20 rounds)
• Casing / Primer: Reloadable brass / Boxer, non-corrosive

Who is the Sellier & Bellot .300 AAC Blackout 200 Grain FMJ Subsonic Ammo for?

• Target shooters using suppressed bolt-action or semi-automatic platforms — operates at a subsonic muzzle velocity of 323 m/s, which eliminates the sonic crack on suppressed .300 AAC Blackout firearms while maintaining a G1 ballistic coefficient of 0.558 for stable paper and steel target engagement.
• Range trainers seeking low-recoil practice ammunition — delivers a mild 678 J of muzzle energy from its heavy 200 gr bullet, producing manageable recoil profiles for high-volume positional drills and marksmanship training within 100 metres.

Less suitable for: Target shooting beyond 100 to 150 metres, where bullet drop reaches -98.5 cm at 200 m and -309.2 cm at 300 m due to the subsonic velocity curve (where a higher-velocity supersonic 110 gr to 147 gr .300 Blackout cartridge is better suited), or medium-to-large game hunting where non-expanding FMJ projectiles do not provide the terminal expansion required for ethical harvesting (requiring expanding soft-point or polymer-tipped hunting ammunition).