Other Details Manufacturer: Weatherby Manufacturer Part Number: B338185TTSX Boxes Per Case: 10 Bullet Type: TTSX Boat Tail Caliber/Gauge: 338 WBY RPM Case Material: Brass Grains: 185 gr Muzzle Energy: 3947 ft lbs Muzzle Velocity (fps): 3100 fps Units per Box: 20 Cost per Round: 5.21