The 340 Weatherby Magnum was introduced by Roy Weatherby in 1962, following (and answering) Winchester's 338 Winchester Magnum. Based on the 300 Weatherby Magnum case necked up, the 340 Weatherby Magnum requires a full-length (375 H&H-length) action, but with much greater case capacity it exceeds the 338 Winchester Magnum by at least 200 feet per second with all bullet weights. It is thus a fine cartridge for elk and big bears, its primary limitation being that recoil is also increased. Those who can handle it maintain it is one of Weatherby's best! Weatherby remains the primary supplier of both rifles and ammunition. Weatherby factory loads include a 200-grain bullet at 3221 feet per second; 225-grain bullet at 3066; and 250-grain bullet at 2963.
