Hornady Frontier .223 Rem FMJ Milspec Ball 55gr Ammo 200rd Box FR501

The Hornady Frontier .223 Remington 55-grain Full Metal Jacket (FMJ) Milspec Ball load is engineered for shooters who demand flawless cycling and steady performance during high-volume training and intense tactical drills. The common headache with bulk ammunition is inconsistent ignition or split casings that cause frustrating jams under rapid firing conditions. Hornady eliminates these reliability bottlenecks by using heavy-duty mil-spec primers and rugged, annealed brass cases designed to withstand the violent extraction cycles of modern gas-operated rifles.

The technical edge comes down to where and how this ammunition is built. Loaded at the legendary Lake City Army Ammunition Plant, these rounds are manufactured using strict military-grade processes. Every variable—from propellant burn rates and primer hardness to case tolerances—is held to rigorous military standards. This extreme consistency minimizes shot-to-shot velocity deviations and eliminates mechanical failures, ensuring your AR-15 cycles smoothly and predictably every single time you reset the trigger.

Screaming out of the muzzle at a blistering 3,240 FPS, this classic 55-grain lead-core projectile delivers a flat, highly predictable ballistic curve. The high-quality brass casings feature visible annealing heat-treatment marks, a clear sign that the metal has been treated to resist neck splitting and gas leaks over multiple firing cycles. Seated with harder mil-spec primers specifically designed to prevent dangerous slam-fires in floating firing pin systems, this bulk-packed training ammunition offers the ultimate blend of safety, smooth feeding, and duty-grade durability.

Key Benefits

• Lake City Army Plant Production: Loaded using strict military-grade manufacturing lines to guarantee exceptional consistency and field safety.
• Annealed Brass Casings: Visible heat-treatment marks indicate enhanced neck strength, preventing case splitting during rapid-fire pressure spikes.
• Mil-Spec Primer Security: Harder primer cups are engineered to prevent slam-fires in rifles with floating firing pins, ensuring ultra-safe operation.
• Flawless High-Volume Cycling: Built to feed, ignite, and extract with 100% reliability in AR-15 and other semi-automatic platforms.

Technical Specification

• Ballistics: .223 Remington | 3,240 FPS Muzzle Velocity | Mil-Spec Ballistic Profile
• Projectile: 55 Grain | Full Metal Jacket (FMJ) | Milspec Ball | Lead Core
• Case/Primer: Annealed Brass Case | Hardened Mil-Spec Boxer Primed | Military-Grade Propellant | Reloadable
• Logistics: 200 Rounds Per Box | Hornady Frontier Series
• Dimensions: .223 Rem | ~5.30 lbs Per Box | SKU: FR501
• Application: High-Volume Range Training | Tactical Carbine Drills | Plinking & Target Practice
• Standards: Manufactured in Compliance with Strict Military Specification and Quality Tolerances

When reliability under volume matters, Hornady Frontier delivers a proven mil-spec solution built on the same production lines trusted for military supply. Get consistent ignition, durable brass, and repeatable performance—shop SMKW with confidence as your trusted source for duty-grade ammunition and bulk training supply.