The Frontier Cartridge .300 AAC Blackout 125-grain Full Metal Jacket (FMJ) Brass 50-round box is a supersonic centerfire rifle cartridge engineered specifically for high-volume target practice, tactical carbine drills, and range training in .300 BLK semi-automatic rifles and short-barreled rifles (SBRs). A primary friction point when shooting training ammunition is erratic gas system cycling and major point-of-impact shifts compared to standard duty rounds. Frontier Cartridge—manufactured stateside utilizing Hornady bullets—completely resolves this operational challenge by loading a precision 125-grain FMJ projectile to a supersonic velocity window, guaranteeing reliable bolt carrier group cycling, clean feeding, and consistent recoil dynamics.
The technical advantage focuses on uniform projectile concentricity paired with calibrated internal ballistics. Launching its 125-grain FMJ bullet at a supersonic muzzle velocity of 2,175 FPS, this load provides a flat trajectory, minimal holdover out to 200 yards, and dependable kinetic energy downrange. Mechanically, the Hornady-manufactured Full Metal Jacket projectile features a streamlined profile and tight concentric tolerances, minimizing bullet dispersion across target strings. The 2,175 FPS output generates ideal gas port pressure in both direct-impingement and piston-driven carbines, ensuring positive ejection, smooth bolt velocity, and predictable bolt lock-back on empty magazines.
Slinging its 125-grain FMJ bullet at 2,175 FPS, this versatile .300 Blackout round is optimized for smooth, non-binding mechanical function across standard AR-15 magazines and feed ramps. Assembled in premium reloadable virgin brass cases fitted with sensitive, non-corrosive Boxer primers and clean-burning propellants, it limits carbon residue buildup inside receiver extensions and bolt assemblies during high-round-count range sessions. The precision-drawn brass cases ensure clean chamber sealing under pressure and positive extractor engagement, delivering high operational reliability and excellent reloadability for handloaders.
Key Benefits
- Loaded with Hornady FMJ Bullets: Features Hornady-manufactured 125-grain FMJ projectiles for consistent concentricity and flight stability.
- Supersonic 2,175 FPS Velocity: Maintains optimal gas port pressure for reliable cycling in direct-impingement and piston-driven rifles.
- Flat-Shooting Target Profile: Delivers minimal bullet drop out to 200 yards for repeatable marksmanship and tactical drill training.
- Select Virgin Brass Casings: Precision-drawn reloadable brass ensures uniform chamber sealing, clean extraction, and long reload life.
Technical Specification
- Ballistics: .300 AAC Blackout (.300 BLK) | 2,175 FPS Muzzle Velocity | Supersonic Target & Training Profile
- Projectile: 125 Grain | Full Metal Jacket (FMJ) | Hornady Lead Core Bullet | Copper Jacket
- Case/Primer: Premium Virgin Reloadable Brass Case | Non-Corrosive Boxer Primed | Clean-Burning Propellant
- Logistics: 50 Rounds Per Box | Frontier Cartridge Series
- Dimensions: .300 BLK Geometry | AR-15 Carbine, SBR, & Bolt-Action Configuration | SKU: FR401
- Application: High-Volume Target Shooting, Tactical Range Training, Plinking, and Carbine Drills
- Standards: SAAMI Compliant | Hornady/Frontier Precision Quality Benchmarks
Source Frontier Cartridge .300 AAC Blackout ammunition from SMKW to maintain consistent training performance with verified lot quality and dependable supply.
