Description PRODUCT DETAIL:Manufacturer: Hornady Bullet Weight: 55 Grains Bullet Style: Full Metal Jacket Boat Tail (FMJBT) Case Type: Brass Muzzle Velocity: 3240 fps Muzzle Energy: 1282 ft/lbs Ballistic Coefficient (G1): .243 Sectional Density: .157 Test Barrel Length (Inches): 24â Rounds Per Box: 50 Rounds Firearms, trailers, and some accessories are only available for purchase in stores. Each location follows all BATF and individual state/county/city laws to insure the desired product is legal for sale. Any info provided online is subject to change, please go to your local store for more accurate information.