Barnes TSX Rifle Bullets .450 Bushmaster Flat Base 275 grain 20 Bullets/Box Copper. The deadly effectiveness of the original Barnes X Bullet with: - All-copper construction - Sleek profile and precision heel radius in FB and BT designs - Accu-Groove technology for decreased fouling and top accuracy - Devastating terminal performance - Available in select Barnes VOR-TX ammunition offerings Specifications for Barnes TSX .450 Bushmaster Rifle Bullets: Manufacturer: Barnes Gun Type: Rifle Bullet Type: Flat Base (FB) Bullet Weight: 275 grain Projectile Caliber: .450 Caliber Diameter: 0.451 in G7 Ballistic Coefficient: 0.215 Sectional Density: 0.193 Core Material: Copper Jacket Material: Copper Bullet Quantity: 20 Bullet Lead Free: Yes Length: 1.024 in Fabric/Material: Copper Package Contents: Barnes TSX .450 Bushmaster Rifle Bullets Barnes 30628: TSX Rifle Bullets .450 Bushmaster Flat Base (FB) 275 grain 20 Bullets/Box Copper