300 WBY Mag

The .300 Weatherby Magnum is a .30 Caliber Rifle Cartridge created by Roy Weatherby in 1944 and produced by Weatherby, becoming one of the most popular of all weatherby cartridges. The .300 Weatherby Magnum is based on a blown-out .300 H&H Magnum case and uses the signature Weatherby double-radius shoulder. The .300 Weatherby Magnum is commonly used by big-game hunters all over the world.