Barnes TSX Rifle Bullets .450/400 Nitro Express Flat Base 400 grain 50 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 .450/400 Nitro Rifle Bullets: Manufacturer: Barnes Gun Type: Rifle Bullet Type: Flat Base (FB) Bullet Weight: 400 grain Projectile Caliber: .45 Caliber Diameter: 0.41 in Sectional Density: 0.341 Core Material: Copper Jacket Material: Copper Bullet Quantity: 50 Bullet Package Contents: Barnes TSX .450/400 Nitro Rifle Bullets Barnes 30514: TSX Rifle Bullets .450/400 Nitro Express Flat Base (FB) 400 grain 50 Bullets/Box Copper