The .300 AAC Blackout is a true switch-hitter. It’s meant to perform just as impressively regardless of whether it’s supersonic or subsonic, which means you can never truly get bored of it!

Here’s your chance to stock up on some of the most economically friendly – albeit still high-quality – subsonic .300 BLK ammo the market has to offer. It’s Sellier & Bellot’s best, straight out of the heart of the Czech Republic!

See this round’s big, BIG 200 grain full metal jacket projectile? It’s too gargantuan to break the speed of sound, and will hit 1,060 fps muzzle velocity out of a 16” barrel (which is around 65 fps lower than the speed of sound). If you’re firing an SBR, then muzzle velocity will be in the triple-digits for sure. If you’re firing through a suppressor, then you’ll *really* be able to appreciate just how quietly S&B Subsonic can perform!

This is hardly the most powerful .300 BLK you could chamber, although its 212.0 power factor does attest to its ability to reliably cycle a semi-automatic. S&B captured the *nonmagnetic* FMJ boat tail bullet’s .558 G1/.242 G7 ballistic coefficients with the same 16” barrel they used to record its 1,060 fps muzzle velocity. S&B also reports -100.1” drop at 300 yards and -207.4” drop at 400 yards if you zero in at 100, which is pretty par for the course for ammo like this.

500 Round Case

Features and Specifications:
Manufacturer Number: SB300BLKSUBA
Caliber: .300 Blackout
Bullet Weight: 200 Grains
Bullet Type: Full Metal Jacket
Muzzle Velocity: 1060 fps
Velocity at 100 yards: 1013 fps
Velocity at 300 yards: 944 fps
Muzzle Energy: 499 ft/lbs
Energy at 100 yards: 456 ft/lbs
Energy at 300 yards: 396 ft/lbs
Reloadable Brass Case
500 Rounds