Sellier & Bellot 308 Winchester 147 Grain Full Metal Jacket Rifle Ammo 20 Rounds. Standard lead core with a metallic jacket. Best for training and target shooting applications. Specifications for Sellier & Bellot 308 Winchester 147 Grain Full Metal Jacket Rifle Ammunition: Manufacturer: Sellier & Bellot Caliber: .308 Winchester Number of Rounds: 20 Bullet Type: Full Metal Jacket (FMJ) Bullet Weight: 147 grain Cartridge Case Material: Brass Muzzle Velocity: 2789 ft/s Muzzle Energy: 2538 ft-lbs Application: Competition Match Package Type: Box Primer Style: Centerfire Sectional Density: 0.221 G1 Ballistic Coefficient: 0.407 G7 Ballistic Coefficient: 0.204 Package Contents: Sellier & Bellot 308 Winchester 147 Grain Full Metal Jacket Rifle Ammunition What is Sellier & Bellot 308 Winchester 147 Grain Full Metal Jacket Rifle Ammunition good for? The manufacturer suggests that it is best for match competition.Sellier & Bellot SB308A: 308 Winchester 147 Grain Full Metal Jacket Rifle Ammo 20 Rounds