Description
The Frontier 300 BLK 125gr FMJ load is built for shooters who want more from their 300 Blackout than typical factory ammunition delivers. Frontier loads a 125 grain full metal jacket to a rated 2175 feet per second, producing about 1313 foot-pounds of energy. Frontier ammunition is loaded by Hornady with new brass and quality bullets, giving shooters affordable, consistent ammunition for training, practice and competition without sacrificing reliability.

Why Choose the Frontier 300 BLK 125gr FMJ
- 125 grain full metal jacket bullet
- Rated 2175 fps and 1313 ft-lbs
- Brass cases with reliable primers
- Loaded by Hornady with new brass
- 20 rounds per box, item FR400
Built for Training and Practice
- Affordable load for regular range practice
- Reliable feeding and ignition
- Consistent velocities for repeatable practice
- Quality brass cases
Buying ammunition by the box from the same production lot keeps velocity and point of impact consistent from one range trip to the next. Keep a record of the load you carry, check your ammunition for dents or loose bullets from time to time, and rotate your carry rounds so the ones in your firearm stay fresh. These simple habits help you get the full performance Frontier builds into every cartridge.
Before you trust any new load, fire enough rounds through your firearm to confirm it feeds, fires and ejects reliably and that the point of impact matches your sights. Full-power loads produce more recoil and muzzle blast than typical range ammo, so practice with the Frontier 300 BLK 125gr FMJ until you are comfortable with it, and store the rest in a cool, dry place in the original box.
About the 300 Blackout
The 300 AAC Blackout was designed to put .30 caliber performance into a standard AR-15 using the same bolt and magazines as the 5.56. It shines in short barrels and suppressed rifles, and supersonic loads like this one give solid energy for range work, home defense, and hunting deer and hogs at moderate distances.
Specifications
- Brand: Frontier Cartridge (Hornady)
- Product Line: Frontier
- Caliber: 300 Blackout
- Bullet Weight: 125 grains
- Bullet Type: full metal jacket
- Muzzle Velocity: 2175 fps
- Muzzle Energy: 1313 ft-lbs
- Case: Brass
- Quantity: 20 rounds
- Item Number: FR400
- UPC: 090255713978
Why Choose Frontier 300 BLK Ammo
Shooters who need dependable 300 blk range ammo want consistent velocity and reliable function box after box. This Frontier load from Frontier delivers that with quality brass cases, reliable primers and carefully measured powder charges, so practice sessions are spent building skill rather than chasing flyers.
The 300 blk 125 grain frontier bullet leaves the muzzle at about 2175 fps with roughly 1313 ft-lbs of energy. Hornady loads it in quality brass with consistent powder charges for dependable accuracy shot to shot.
Whether you are sighting in, practicing or heading to the field, choosing a proven load like the Frontier 300 BLK 125gr FMJ removes one more variable, so you can focus on your fundamentals and shoot with confidence every time you pull the trigger.
Frontier Cartridge is a Hornady brand that loads new components into quality brass for affordable, dependable practice ammunition. Its Frontier line brings Hornady quality control to high-volume shooting, and 300 blk ammo from Frontier is a favorite for training and range days.
Always confirm your firearm is chambered for 300 Blackout, wear eye and ear protection, and follow all federal, state and local laws.
Browse more ammunition at Mag 5 Firearms, or visit Frontier Cartridge (Hornady) for more about their full line of loads.









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