Barnes TSX Rifle Bullets .405 Winchester Flat Base 300 grain 50 Bullets/Box Copper. These bullets are designed to expand upon impact producing four razor sharp petals with deep cutting capability. For hunters who want to ensure a one-shot kill the bullets penetrate dense bone and tissue. In addition the bullets are designed to retain 100 percent of the original weight. The manufacturer states the best accuracy is found when seating from 0.03 to 0.07 inches based on the rifle being used. These live bullets are ready to take down big game. Specifications for Barnes TSX .405 Rifle Bullets: Manufacturer: Barnes Gun Type: Rifle Bullet Type: Flat Base (FB) Bullet Weight: 300 grain Projectile Caliber: .405 Caliber Diameter: 0.411 in G7 Ballistic Coefficient: 0.281 Sectional Density: 0.254 Core Material: Copper Jacket Material: Copper Bullet Quantity: 50 Bullet Length: 1.257 in Country of Origin: USA Fabric/Material: Copper Package Contents: Barnes TSX .405 Rifle Bullets Barnes 30516: TSX Rifle Bullets .405 Winchester Flat Base (FB) 300 grain 50 Bullets/Box Copper