The Hornady Frontier .300 AAC Blackout 125-grain Full Metal Jacket (FMJ) Lake City Brass 150-round box is a high-performance centerfire cartridge engineered for high-volume range training, tactical drills, and target shooting in .300 BLK rifle platforms. A common challenge with bulk-packaged .300 Blackout training ammunition is inconsistent gas cycling, feed ramp hang-ups, and premature case neck fatigue caused by variable brass prep or improper bulk storage. Hornady resolves these operational issues by combining clean-burning propellants with military-grade, annealed Lake City brass and protective internal packaging, delivering uniform gas pressure, flawless slide and bolt action, and extended case utility.
The primary technical advantage centers on the cartridge's 125-grain supersonic projectile paired with military-spec Lake City brass construction. The 125-grain weight profile provides the ideal gas impulse for both direct impingement and gas-piston systems, ensuring positive bolt extraction and round feeding without requiring adjustable gas block tweaks. The full metal jacketed projectile features a smooth, durable copper jacket that eliminates feed ramp lead shaved debris and minimizes barrel fouling. Furthermore, the visible neck annealing on the Lake City virgin brass enhances metal elasticity, ensuring uniform chamber sealing, resistance to neck splitting, and outstanding reloadability.
Propelling its 125-grain FMJ bullet at a factory-rated 2,175 FPS muzzle velocity (generating 1,313 ft-lbs of muzzle energy), this Frontier load delivers flat trajectories and authoritative downrange energy transfer out to 300 yards. Assembled under strict military quality standards using non-corrosive Boxer primers and clean-burning propellants, the load guarantees reliable ignition and minimal receiver residue. Packed in a grid-oriented 150-round box, each cartridge remains securely positioned to prevent bullet nose denting or rim damage during transport, making it an ideal choice for intensive rifle courses and tactical carbine drills.
Key Benefits
- Optimized Supersonic Gas Impulse: 125-grain mass generates reliable gas pressure for smooth cycling in direct impingement and piston carbines.
- Annealed Lake City Brass: Military-grade brass features neck annealing for enhanced durability, reliable chamber sealing, and high reloadability.
- Full Metal Jacket Profile: Smooth copper encasement ensures snag-free feeding on M4/AR-15 feed ramps and reduces barrel fouling.
- Oriented Bulk Storage: Grid-packed 150-round box protects bullet tips and case rims from transport damage and rim locking.
Technical Specification
- Caliber: .300 AAC Blackout (.300 BLK)
- Ballistics: 2,175 FPS Muzzle Velocity | 1,313 Ft-Lbs Muzzle Energy
- Projectile: 125 Grain | Full Metal Jacket (FMJ) | Copper Jacket | Lead Core
- Case/Primer: Precision-Drawn Annealed Lake City Virgin Brass | Clean-Burning Powder | Non-Corrosive Boxer Primed
- Logistics: 150 Rounds Per Box | Grid-Oriented Bulk Storage | Hornady Frontier Series
- Dimensions: Standard .300 BLK Geometry | SKU: FR402
- Application: Range Training, Tactical Carbine Drills, Action Target Shooting, and Plinking
- Standards: SAAMI Compliant | Military-Spec Manufacturing Quality Assurance
If you're running a .300 BLK platform and need consistent cycling with reloadable brass for high-volume use, this load provides stable pressure performance and dependable feeding. Get proven Lake City production backed by Hornady projectile standards—available now from SMKW, a trusted source for rifle ammunition.
