What barrel twist rate is required to properly stabilise the Sellier & Bellot 200 grain subsonic .300 AAC Blackout FMJ ammo?

Optimal stabilisation of this long, heavy 200 gr projectile requires a fast barrel twist rate, typically 1:7 or 1:8 inches. Firearms equipped with slower twist rates, such as 1:10 or slower, may fail to stabilise the bullet properly, leading to potential accuracy loss.

Can I use the S&B 200 grain FMJ subsonic rounds for hunting medium-to-large game in Australia?

No, these rounds feature a Full Metal Jacket (FMJ) projectile which does not expand upon impact. They are strictly designed for target practice and range training within 0 to 100 metres, and are unsuitable and generally unlawful for ethical hunting of medium-to-large game.

Are the brass casings on the S&B V345112 ammunition reloadable for handloaders?

Yes, these cartridges feature high-grade, reloadable brass casings paired with non-corrosive Boxer primers. This makes them an excellent choice for handloaders looking to re-use the brass after range sessions.

What kind of trajectory drop can I expect if I shoot this subsonic ammunition beyond 100 metres?

Because of the heavy 200 grain bullet weight and subsonic muzzle velocity of 323 m/s, the trajectory remains relatively flat up to a 100-metre zero, but experiences steep ballistic drop beyond that range. You will encounter a severe drop of approximately –98.5 cm at 200 metres and –309.2 cm at 300 metres.

300 Blackout Ammo - Sellier Bellot V345112

The Sellier & Bellot .300 AAC Blackout 200 Grain FMJ Subsonic ammunition (Model V345112) is a factory-loaded target cartridge engineered to remain below the speed of sound across standard barrel lengths. Designed for firearms chambered in .300 AAC Blackout (7.62×35mm), this ammunition uses a heavy 200-grain (13.00 g) Full Metal Jacket projectile (Bullet #2950) with a lead core and CuZn 10 alloy jacket. Testing from a 410 mm (16.14 in) barrel yields a muzzle velocity of 323 m/s (1,060 fps) and a muzzle energy of 678 J (500 ft-lbs). Packaged in a bulk 100-round box weighing approximately 1.99 kg, this loading eliminates the sonic crack for suppressed and unsuppressed range shooting while providing consistent cycling in rifles with fast twist rates such as 1:7" or 1:8".

Key Features

Subsonic Ballistic Performance: Operates at a factory muzzle velocity of 323 m/s to stay reliably under the speed of sound, eliminating standard sonic crack.
Heavy Aerodynamic Projectile: Features a 200-grain FMJ bullet delivering a G1 ballistic coefficient of 0.558 and a G7 ballistic coefficient of 0.242.
Reloadable Quality Components: Assembled with factory-new standard-pressure brass casings and non-corrosive Boxer primers for post-firing reloading.
Consistent Cartridge Dimensions: Manufactured to an overall length of 56.00 mm (2.205 in) to ensure reliable feeding and chambering.

Product Specifications

Calibre: .300 AAC Blackout (7.62×35mm)
Projectile Weight: 200 grains (13.00 g)
Bullet Type: Full Metal Jacket (FMJ, Bullet #2950)
Muzzle Velocity: 323 m/s (1,060 fps)
Muzzle Energy: 678 J (499–500 ft-lbs)
Velocity at 100 m: 308 m/s (616 J)
Ballistic Coefficients: G1: 0.558 | G7: 0.242
Overall Length: 56.00 mm (2.205 in)
Case Type: Brass, non-corrosive Boxer-primed
Packaging: 100 rounds per box

Who is the S&B Sellier & Bellot 300 AAC Blackout 200 Grain FMJ Ammo 100 Rd for?

Target shooters and range hobbyists — Fires at a subsonic muzzle velocity of 323 m/s to eliminate sonic signature within 100 metres, retaining 616 J of energy at 100 m for low-noise target shooting using this .300 AAC Blackout subsonic ammunition.
Handloaders — Ships with reloadable brass casings and non-corrosive Boxer primers seated to a standard 56.00 mm overall cartridge length across 100 rounds per box, supplying consistent brass stock for custom subsonic .300 AAC Blackout reloading.

Less suitable for: Target shooting beyond 150 to 200 metres, where this subsonic bullet exhibits steep drop reaching –98.5 cm at 200 m (faster supersonic 110 gr to 147 gr ammunition provides a flatter trajectory), or medium-to-large game hunting, where non-expanding FMJ projectiles do not provide ethical terminal performance (expanding polymer-tipped or soft-point hunting cartridges fit better).

SKU	SAB42316LP
Model #	V345112
Brand	S&B
Shipping Weight	1.0000kg

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Sellier & Bellot V345112 Ammunition 300 Blackout 200 Grain Fmj

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