Hornady FMJ Rifle Bullets 7.62x39 mm 123 grain Full Metal Jacket FMJ 2800 Bullet. The thin-plated full metal jacket offered by other manufacturers is easily distorted and often breaks or separates when the bullet impacts the target. The Hornady AMP bullet jacket features virtually zero tolerance for concentricity and near-zero wall thickness variation punching through targets without deforming or breaking. Specifications for Hornady FMJ Rifle Bullets 7.62x39 mm 123 grain Full Metal Jacket FMJ: Manufacturer: Hornady Gun Type: Rifle Bullet Type: Full Metal Jacket (FMJ) Caliber: 7.62x39mm Bullet Weight: 123 grain Projectile Caliber: .308 Caliber Diameter: 0.31 in G1 Ballistic Coefficient: 0.266 Sectional Density: 0.183 Jacket Material: Full Metal Bullet Quantity: 2800 Bullet Features of Hornady FMJ Rifle Bullets RUGGED AMP BULLET JACKET Hornady Traditional and FMJ bullets are built with a rugged AMP bullet jacket (Advanced Manufacturing Process) that clearly delivers better performance. SUPERIOR DESIGN The thin-plated full metal jacket offered by other manufacturers is easily distorted and often breaks or separates when the bullet impacts the target. VIRTUALLY ZERO VARIATION The Hornady AMP bullet jacket features virtually zero tolerance for concentricity and near-zero wall thickness variation punching through targets without deforming or breaking. Package Contents: Hornady FMJ Rifle Bullets 7.62x39 mm 123 grain Full Metal Jacket FMJ Hornady 3147B: FMJ Rifle Bullets 7.62X39 mm .310 123 Gr FMJ