H&H Magazine Rifle in .300 H&H Magnum—the original belted magnum cartridge in the rifle that made it famous. A classic of English bolt-action tradition. Type: Rifle Action: Bolt-Action Caliber: .300 H&H Mag Capacity: 4 Year introduced: 1925, United Kingdom Weight: 112 oz Overall length: 44" Status: Active Intended use: Hunting, Long Range, Safari