The .340 Weatherby Magnum necks down the .378 Wby Mag case to .338 caliber, creating a cartridge that surpasses the .338 Win Mag by a significant margin. With a 250-grain bullet at 2,941 fps, it generates over 4,800 ft-lbs of muzzle energy — sufficient for any dangerous game. Long regarded as a borderline dangerous-game cartridge, it bridges the gap between standard magnums and the true elephants of the lineup. Type: Rifle Action: Bolt-Action Caliber: .340 Wby Mag Capacity: 3 Year introduced: 1962, USA Weight: 9.5 oz Overall length: 47" Status: Active Intended use: Hunting