Sellier & Bellot Ammunition 300 AAC Blackout 124 Grain Full Metal Jacket 20RD

The Sellier & Bellot 300 AAC Blackout 124 grain full metal jacket round is a reliable, consistently-performing choice for shooters running the increasingly popular .300 Blackout platform. Whether you're zeroing a new suppressed rifle, working up loads at the range, or stocking up for field use, this Czech-manufactured ammunition delivers the kind of no-nonsense performance that's made Sellier & Bellot a trusted name among hunters and shooters for over 160 years. The 124-grain FMJ projectile is a sensible middle ground for the cartridge—clean-shooting, predictable, and effective across the effective range of the round.

The .300 Blackout has earned its place in the modern shooter's arsenal for good reason: it cycles reliably in AR-15 platforms, performs well with suppression, and delivers real downrange energy in a compact footprint. Sellier & Bellot ammunition is field-tested and manufactured to exacting standards, so you can focus on marksmanship rather than worrying whether your round will perform when you need it. The 20-round box format makes it easy to grab for a range day, sighting-in session, or practice run.

If you're new to the .300 Blackout or expanding your ammunition selection, this load offers a straightforward entry point—no exotic claims, just honest ammunition from a maker with a long track record. Reload data, ballistic research, and range reports are plentiful in the .300 Blackout community, so you'll have no shortage of information to dial in your specific rifle and suppressor setup.

Key Features

• 124-grain full metal jacket projectile for reliable feeding and straightforward ballistics
• Designed for .300 AAC Blackout platforms, including suppressed AR-15 rifles
• Czech-manufactured by Sellier & Bellot, a maker with over 160 years of ammunition heritage
• 20 rounds per box for convenient storage and transport

Specifications

Frequently Asked Questions

Will this .300 Blackout ammunition work in my AR-15?

Yes, provided your AR-15 is chambered in .300 AAC Blackout. The round cycles reliably in modern .300 Blackout rifles, including suppressed builds.

Is 124 grain the right bullet weight for the .300 Blackout?

The .300 Blackout is versatile and performs well across a range of bullet weights. The 124-grain FMJ offers predictable ballistics and reliable performance; heavier subsonic loads (typically 200+ grains) are popular for suppressed shooting, while lighter rounds like this suit general range work and field use.

What does FMJ mean, and is it right for my use?

FMJ stands for full metal jacket—the projectile is completely enclosed in a copper jacket. This design promotes reliable feeding, reduces fouling, and produces straightforward ballistics. It's a common choice for range practice, training, and general shooting.

How many rounds are in a box?

Each box contains 20 rounds of ammunition.