Backed by generations of legendary excellence, Winchester "USA White Box" stands for consistent performance and outstanding value, offering high-quality .223 / 5.56 NATO Ammo to suit a wide range of hunter's and shooter's needs. This Winchester USA 5.56x45mm NATO 55 grain Ball (M193) Full Metal Jacket Brass Centerfire Rifle Ammunition is no different, packing a powerful punch in a 5.56 cartridge to give you the stopping power you need. Specifications for Winchester USA 5.56x45mm NATO 55 grain Ball (M193) Full Metal Jacket Brass Centerfire Rifle Ammunition: Manufacturer: Winchester Cartridge: 5.56x45mm NATO Bullet Type: Full Metal Jacket (FMJ) Bullet Weight: 55 grain Cartridge Case Material: Brass Muzzle Velocity: 3180 ft/s Muzzle Energy: 1235 ft-lbs Application: Recreational Shooting, Target Package Type: Box Primer Style: Centerfire G1 Ballistic Coefficient: 0.246 Lead Free: No Features of Winchester USA 5.56x45mm NATO 55 grain Ball (M193) Full Metal Jacket (FMJ) Brass Centerfire Rifle Ammunition: Consistent Accuracy: Ideal for shooters of all skill levels Full Metal Jacket: Provides positive functioning and no expansion Robust Heat Treated Shellcase Package Contents: Winchester USA 5.56x45mm NATO 55 grain Ball (M193) Full Metal Jacket (FMJ) Brass Centerfire Rifle Ammunition