Ballistics: Muzzle Velocity – 3270 fps Muzzle Energy – 1306 ft lbs Ballistic Coefficient – 0.243 Bullet Length – 0.740 Sectional Density – 0.156 Specifications: Caliber: 5.56×45 Weight: 55 grain Bullet Style: Full Metal Jacket Casing: Brass Part #: 5.56X