The.375 Weatherby Magnum (9.573mmB) rifle cartridge is a medium-bore cartridge.
The cartridge is blown out, modified, and given the Weatherby double radius shoulder – the Weatherby treatment – version of the.375 H&H Magnum.
The.375 Weatherby Magnum, unlike other enhanced variants of the .375 H&H Magnum, such as the .375 Ackley Improved, is not a wildcat and existed as a proprietary cartridge until the CIP issued specifications for the cartridge.
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