The Barnes VOR-TX ammunition is considered one of the most effective hunting cartridge lines in the world. Barnes' TSX bullets feature an all-copper construction designed to achieve 28% deeper penetration than lead-core bullets with greater weight retention. The TSX bullet is designed to expand into four sharp-edged copper petals upon contact destroying tissue, bone, and vital organs for a quick, humane kill. The TSX bullet features a bullet shank with multiple, precisely engineered grooves that reduce pressures allowing for higher velocities. This premium Barnes rifle load features their Triple-Shock X (TSX) bullet designed for accuracy, weight retention, rapid expansion, and deep penetration. Manufacturer: Barnes Model Number: 21520 Ammo Bullet Type: Triple Shock X Flat Base Ammo Casing Type: Brass Ammo Bullet Weight: 55 grain Caliber Multi: .223 Remington Muzzle Energy: 1282 lb/ft Muzzle Velocity: 3240 fps Application: Whitetail Deer, Elk, Antelope, Boar Series/Collection: VOR-TX