5.56x45mm – 62 Grain M855 FMJ – Winchester (WM855K) – 1000 Rounds

The 5.56×45mm 62 gr M855 FMJ Winchester (WM855K) load delivers dependable performance for shooters who want consistent function and realistic training characteristics. It uses a Full Metal Jacket (FMJ) projectile with a steel penetrator core, which mirrors the weight and handling of standard M855 profiles. Because of this design, the load suits buyers focused on range training, carbine practice, and platform familiarization. Many shooters select M855-pattern ammunition to maintain consistency with common duty and service configurations.

Winchester loads the WM855K to a muzzle velocity of 3,060 fps and a muzzle energy of 1,289 ft-lbs from standard test barrels. These ballistics create a flat trajectory and strong downrange performance. As a result, shooters experience predictable point-of-impact and reliable cycling in AR-platform rifles. In addition, the 62-grain bullet weight provides a familiar recoil impulse and improved stability compared to lighter projectiles. Consequently, this load performs well during drills, zero confirmation, and extended training sessions.

This product ships as 20 rounds per box and 50 boxes per case (1,000 rounds total). Therefore, buyers receive substantial volume for high-round-count training programs, agency use, or range stock rotation. Winchester manufactures this ammunition with brass cases and non-corrosive Boxer primers, ensuring dependable ignition and smooth extraction. Furthermore, Winchester’s quality standards emphasize consistent pressures and uniform velocities across production lots.

While optimized for training and target use, the 5.56×45mm 62 gr M855 FMJ Winchester (WM855K) also appeals to shooters who want realistic handling and trusted Winchester reliability. Ultimately, it delivers consistency, velocity, and confidence in a proven 5.56 NATO load.