Indians For Guns

wuts the diff between H&H .375 magnum, winchester .375 magnum, ruger .375 and .375 pistol.??????????
and can only .375 caliber be called magnum or we have another caliber magnums too?

.375 Winchester is a much smaller rimmed case, made for the M94 Winchester lever action. Ruger .375 is a rimless case with slightly more power than the .375 H&H Magnum, with a case diameter the same as the H&H belt diameter.
There is no factory .375 pistol cartridge.
Cartridges on the basic H&H belted case are called "Magnum" in American usage. Weatherby .257 Magnum, Winchester .264 Magnum, Remington 7mm Magnum, Winchester .300 Magnum, are all examples of such "Magnum" cartridges based on the (shortened) H&H case. The designation has nothing to do with the belted case per se, but designates a cartridge of greater powder capacity and power.

Thanks for the info.