The .378 Weatherby Magnum was Roy Weatherby's answer to hunters who found the .375 H&H insufficient. Based on a blown-out, rebated-rim version of the .416 Rigby case, it pushes a 300-grain bullet past 2,925 fps for over 5,700 ft-lbs of muzzle energy. It requires the full-length Mark V action and is considered a minimum for the largest African dangerous game. Type: Rifle Action: Bolt-Action Caliber: .378 Wby Mag Capacity: 2 Year introduced: 1953, USA Weight: 10.5 oz Overall length: 48" Status: Active Intended use: Hunting