Originated by the British firm Holland & Holland in 1912, this is one of the original belted, rimless, magnum-type cartridges. It’s been used as the basis for numerous wildcats and most of the Weatherby cartridges. H&H furnished it in a magnum Mauser action, and Griffin & Howe chambered rifles for it, beginning about 1926. At present, Federal, Remington, and Winchester load the .375. The first American commercial rifle to chamber the round was the Model 70 Winchester, in 1937. At present, several American manufacturers list the .375 H&H as standard including Ruger, Winchester, and Remington.
Long considered the best all-round African caliber, the .375 H&H is overpowered for North America. However, many Alaskan hunters and guides prefer it for moose and grizzly bear. John Taylor, in his book “African Rifles…