Description
This is the kind of ammo you reach for when tight groups matter. HSM Match .300 AAC Blackout loaded with Hornady A-Max bullets gives you the consistency and accuracy you need whether you're working on precision drills at the range or testing a new setup. The 208 grain A-Max projectile is specifically engineered for ballistic performance with its low-drag polymer tip and boat tail design, which means you get stable flight and repeatable results shot after shot.
Match-Grade .300 Blackout Designed for Precision
This is match-grade ammunition built with time-honored crafting from a manufacturer that knows what serious competitors and precision shooters need. Each round comes from Hunting Shack Munitions, made in Montana since 1968, and loaded to consistent velocities around 1015 fps. The Hornady A-Max is a hollow point with polymer tip technology that maintains in-flight stability better than many other subsonic loads, which matters if you're trying to dial in your rifle or trust your zero.
Subsonic Performance Without Compromise
At 208 grains and subsonic speeds, these rounds deliver their real benefit when paired with a suppressor. The lighter recoil and quieter operation make for a cleaner shooting experience, and there's no sonic crack to deal with. But they're not just a suppressor round. The consistency of HSM Match ammunition means reliable performance from a 9 to 12 inch barrel, and the accuracy potential at 100 yards is genuinely tight when you do your part behind the trigger. Reloadable brass cases also mean you can make these rounds work for you long term if you have a reloading setup.
Built for the Range and the Shooter Who Cares
You get 20 rounds per box packaged to get to you in good shape. HSM's reputation in the industry is built on quality control and attention to detail, and this load shows why. The A-Max bullet is no gimmick. It's been proven across thousands of rounds in competitive matches and precision training, and it performs the way the specs suggest it will. Whether you're testing loads, building skills, or just want ammo that shoots as well as you do, this is the stuff that delivers.
Key Specifications
- Caliber: .300 AAC Blackout (7.62x35mm)
- Bullet Weight: 208 grains
- Bullet Type: Hornady A-Max (Spitzer Boat Tail)
- Muzzle Velocity: 1015 fps
- Muzzle Energy: 476 ft-lbs
- Rounds per Box: 20
- Boxes per Case: 25
- Case Material: Brass (reloadable)
- Primer Type: Boxer Centerfire
- Application: Match, Range, Target
- Manufacturer: HSM (Hunting Shack Munitions)
- Manufacturer Part Number: 300BLK1N
- UPC: 837306006777
What’s Included
- 20 rounds of match-grade .300 AAC Blackout ammunition
Frequently Asked Questions
Is this HSM .300 Blackout subsonic and will it work with suppressors?
Yes, these are subsonic rounds loaded to around 1015 fps, which is below the speed of sound. They're specifically designed and optimized for suppressed shooting. When used with a quality suppressor on the right barrel length, they deliver hearing-safe performance without the sonic crack.
What accuracy can I expect from this 208 grain A-Max ammunition?
The match-grade Hornady A-Max projectile is engineered for precision, and at 100 yards you should see tight groupings well within 1 MOA or better depending on your rifle and shooting conditions. This is competition-grade ammunition built for consistency, so the accuracy potential is real.
Can I reload the brass cases from HSM's .300 Blackout ammo?
Yes, these come in reloadable brass cases with Boxer primers, so you can recycle them if you have reloading equipment and components. This makes them a good value over time for shooters who reload.
What barrel length works best with these subsonic rounds?
While they perform well across different barrel lengths, a 9 to 12 inch barrel is generally considered optimal for subsonic .300 Blackout rounds. This length helps maintain the balance between velocity, accuracy, and suppressor effectiveness.




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