The .300 mag Winchester Magnum (additionally called .three hundred Win mag or 300WM) (7.62×67mmB, 7.62x66BR) is a belted, bottlenecked magnum rifle cartridge that was delivered by means of Winchester Repeating palms enterprise in 1963. The .three hundred Winchester Magnum is a magnum cartridge designed to match in a wellknown rifle movement. it’s far based on the .375 H&H Magnum, which has been blown out, shortened, and necked down to accept a .30 caliber (7.62 mm) bullet.
The .three hundred Winchester is extraordinarily versatile and has been followed by a huge range of users consisting of hunters, target shooters, navy devices, and regulation enforcement departments. Hunters observed the cartridge to be an effective all-around choice with bullet options starting from the flatter shooting one hundred sixty five grain to the harder hitting 2 hundred+ grain picks available from the manufacturing unit. The .300 Win magazine stays the maximum popular .30 quality magnum with American hunters.