Sierra Tipped GameKing 30Cal 180gr Reloading Bullets 500/Box. The new #4681 bullet will allow proper seating in the 308 and 30-06 and provide a true heavy bullet/heavier game performance. It has an attractive .543 G1 B.C. for enhanced trajectory and it also provides excellent penetration and accuracy. Specifications for Sierra Bullets 4681C Tipped GameKing 30Cal 180gr 500/Box: Manufacturer: Sierra Bullets Bullet Weight: 180 grain Projectile Caliber: .30 Caliber Diameter: 0.308 in Additional Features: Tipped GameKing Sierra Bullets 4681C Tipped GameKing 30Cal 180gr 500/Box