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Currently A-square is the only other factory ammunition producer of the .340 Weatherby Magnum, which has led to limited popularity of the caliber. In field tests the .340 clearly outperforms the 300 Ultra mag, .338 Win mag. and even rivals the larger .375 H&H, providing a much flatter shooting and harder hitting performance.
Keith designed and used many unique cartridges for his North American hunting pursuits, his wildcat rifle cartridges are seen to have influenced the development of many modern hunting cartridges including the .338-06, .338-378 Weatherby Magnum and .340 Weatherby Magnum, he is credited with inspiring Winchester to develop the .338 Winchester Magnum.
This is about twice as much as the recoil from an average .308 Winchester. Strong recoil like this can be mitigated with the use of properly designed stocks and recoil pads. By comparison, this cartridge has less recoil than other more powerful .338-caliber rifles such as the .338 RUM, .340 Weatherby and .338 Lapua.
The .378 Weatherby generates considerable free recoil with full-power loads, for an average of 72 ft·lbf from a 9 lb rifle. This compares to 23 ft·lbf from a rifle chambered for .30-06 Springfield or 44 ft·lbf for the .375 H&H Magnum. However, the .458 Winchester Magnum generates 78 ft·lbf and the .458 Lott produces 86 ft·lbf of free ...
Since the 1960's a relatively obsure cartridge only known to handloaders and "Wildcatters", eventually A-Square adopted the caliber as the .338-06 A-Square in approximately 1998. They then submitted it for approval by SAAMI as a standardized caliber. Weatherby offered factory rifles and ammunition, but has now dropped the rifles from its inventory.
The .338-378 Weatherby Magnum is based on the .338-378 KT, a wildcat cartridge created by Elmer Keith and R.W. "Bob" Thomson in 1966. [2] The KT is based on the .378 Weatherby Magnum cartridge but is shorter by 1/4" and necked down to a .338 caliber bullet. [ 3 ]
Pages in category "Weatherby Magnum rifle cartridges" The following 15 pages are in this category, out of 15 total. ... .338-378 Weatherby Magnum.340 Weatherby Magnum
The Weatherby Mark V is a centerfire, bolt-action rifle manufactured by Weatherby of Sheridan, Wyoming. [2] The rifle was introduced in 1957 by Weatherby and was designed to safely contain the high pressures associated with the Weatherby line of high performance cartridges. It is the flagship rifle of the Weatherby line of firearms.