Barnes Bullets TSX 50 BMG .510 647 GR TSX Boat Tail 20 Box. The patented solid copper X-cutter nose gives hunters the accuracy they need for long-range one-shot kills on big game. The patented sharp nose increases the ballistic coefficient giving hunters the control they need to make the most of each shot. The copper X-cutter nose also allows hunters to shoot through a greater range of velocities with greater accuracy while retaining 100 percent of their original weight. All this plus the bullet's exclusive four-petal design makes the TSX a top choice for hard-hitting tactical minded applications. Specifications for Barnes Bullets 30700 TSX 50 BMG .510 647 GR TSX Boat Tail 20 Box: Manufacturer: Barnes Bullet Type: Hollow Point (HP) Boat Tail Hollow Point (BTHP) Bullet Weight: 647 grain Projectile Caliber: .50 Caliber Sectional Density: 0.355 Bullet Quantity: 20 Bullet Country of Origin: USA Housing/Frame Material: Copper Fabric/Material: Copper Package Contents: Barnes Bullets 30700 TSX 50 BMG .510 647 GR TSX Boat Tail 20 Box Barnes Bullets 30700 TSX 50 BMG .510 647 GR TSX Boat Tail 20 Box