Barnes Bullets TSX 30 Caliber .308 180 GR TSX Boat Tail 50 Box. The projectile retains 100 percent of its original weight and expands on impact creating tremendous pressure that is necessary for deep penetration. The Barnes X-Bullet in 180 grain is a tactically-spun projectile that controls expansion and maintains energy over extreme ranges. Barnes aims to please with high quality precision and dependable performance in all kinds of gun ammunition. Specifications for Barnes Bullets 30353 TSX 30 Caliber .308 180 GR TSX Boat Tail 50 Box: Manufacturer: Barnes Bullet Type: Hollow Point (HP) Boat Tail Hollow Point (BTHP) Bullet Weight: 180 grain Projectile Caliber: .30 Caliber Sectional Density: 0.271 Bullet Quantity: 50 Bullet Country of Origin: USA Housing/Frame Material: Copper Fabric/Material: Copper Package Contents: Barnes Bullets 30353 TSX 30 Caliber .308 180 GR TSX Boat Tail 50 Box Barnes Bullets 30353 TSX 30 Caliber .308 180 GR TSX Boat Tail 50 Box