Winchester USA White Box 5.56x45mm NATO M193 Rifle Ammunition 150 Rounds brass Centerfire FMJ WM193150

When you're running high-volume carbine drills or fine-tuning your tactical setup, Winchester USA White Box 5.56x45mm NATO M193 55 Grain FMJ ammunition provides the military-spec consistency you count on. Engineered for intensive training and duty preparation, this bulk 150-round box eliminates point-of-impact shifts, ensuring your optics align perfectly shot after shot.

At the core of each round is a standardized 55-grain Full Metal Jacket bullet featuring a mechanical cannelure to prevent projectile setback during rapid feeding. Leaving the barrel at a blistering 3,180 FPS and generating 1,235 ft-lbs of muzzle energy, it delivers a flat trajectory that matches standard BDC reticles. Clean-burning propellants keep direct-impingement AR-15 gas systems running smoothly across long firing strings.

Loaded into high-grade, annealed brass cases with sealed centerfire Boxer primers, these rounds resist moisture and withstand intense NATO chamber pressures. Heat-treated case necks prevent splits and ensure seamless feeding and extraction in hard-use modern sporting rifles. Whether you're drilling tactical reloads or testing firearm function, trust Winchester USA White Box to deliver rugged reliability and repeatable accuracy every time you pull the trigger.

The Winchester USA White Box 5.56mm rifle ammo features annealed brass cases and FMJ bullets.

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