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 3,500 feet per second. Reintroduced as a Weatherby production cartridge in 1996.
Cartridge | Weight | Style | Ballistic Coefficient | Quantity | Usage |
30-378 WBY Mag | 130 Grains | Barnes TTSX | | 20 | Medium Game |
30-378 WBY Mag | 165 Grains | Barnes TTSX | 0.442 | 20 | Medium/Big Game |
30-378 WBY Mag | 180 Grains | AccuBond | 0.357 | 20 | Medium Game |
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