Weatherby 30-378 WBY Magnum Barnes TSX, 180 Grain Box of 20 #17533


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Initially a wildcat cartridge developed by Roy Weatherby in 1959 at the request of the United States Army. This white-hot cartridge is based on the 378 necked down to 30 caliber and packed with powder. Originally billed as the world’s fastest 30 caliber cartridge, it will push a 30 caliber bullet more than 3,500 feet per second. Reintroduced as a Weatherby production cartridge in 1996.

Shipping for single boxes of this ammunition is an option at an additional $55.00 charge due to the nature of the product.


  • Weatherby Model(s): B303180TSX / 17533
  • Caliber: 30-378 Weatherby Magnum
  • Bullet Type: Barnes TSX
  • Grain: 180
  • Volume: Box of 20
  • Muzzle Velocity: 3360 fps
  • Velocity at 300 Yards: 2709 fps
  • Energy in Foot-Pounds at Muzzle: 4513
  • Energy in Foot-Pounds at 300 Yards: 2935
  • Drop at 100 yards: +2.7"
  • Drop at 300 Yards: +/-0.0"
  • Drop at 400 Yards: -8.1"

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