Sierra Tipped GameKing 6.5mm 145gr Reloading Bullets 500/Box. 5mm 145gr 500/Box - This bullet was engineered around the 6.5 PRC. Giving a heavier bullet with a tremendous G1 B.C of .597 to capitalize on the high velocity potential of the intended cartridge. Also providing excellent expansion results in a true long range hunting bullet. Specifications for Sierra Bullets 4345C Tipped GameKing 6.5mm 145gr 500/Box: Manufacturer: Sierra Bullets Bullet Weight: 145 grain Projectile Caliber: .264 Caliber Diameter: 0.264 in Additional Features: Tipped GameKing Sierra Bullets 4345C Tipped GameKing 6.5mm 145gr 500/Box