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The Magnum Research BFR is a single-action revolver manufactured by Magnum Research.Modeled after the Ruger Blackhawk, it is constructed of stainless steel and chambered for a number of powerful handgun cartridges, such as .460 S&W Magnum and .500 S&W Magnum; popular rifle chamberings, including .30–30 WCF, .444 Marlin, and .45-70 Government; and even .410 bore shotshells.
The .45-70 (11.6x53mmR), also known as the .45-70 Government, .45-70 Springfield, and .45-2 1 ⁄ 10" Sharps, is a .45 caliber rifle cartridge originally holding 70 grains of black powder that was developed at the U.S. Army's Springfield Armory for use in the Springfield Model 1873.
The .500 Bushwhacker is a .50 caliber semi-rimmed revolver cartridge developed by TII Armory for the Magnum Research BFR revolvers. It is currently the most powerful revolver cartridge in the world, offering a similar level of ballistic performance to African stopping rifles, such as the .416 Rigby and .470 Nitro Express.
.45 ACP.45 Auto Rim: 6 United States: 1917-1920 Magnum Research BFR: Magnum Research.30-30 Winchester.38-55 Winchester.375 Winchester.444 Marlin.45 Colt.410.45-70 Government.45-90 Sharps.450 Marlin.460 S&W Magnum.500 S&W Magnum.50 Beowulf.22 Hornet.218 Bee.44 Remington Magnum.454 Casull.480 Ruger.475 Linebaugh.50 GI.50 Action Express.500 JRH: 5
Magnum Research Desert Eagle 1911G Magnum Research BFR in .50 AE. Magnum Research DE1911G, DE1911C, and DE1911U [10] Desert Eagle (Mark VII pistol, Mark XIX pistol) [11] Magnum Lite (rimfire rifle) Magnum Research BFR (Big Frame Revolver) Micro Desert Eagle ; MR Eagle Series Pistols; Mountain Eagle (center-fire rifle) New Baby Eagle "Fast Action"
The .500 Linebaugh is a proprietary cartridge and thus has not been adopted by mainline firearms manufacturers. Currently the only firearm manufacturer that produces a revolver for this cartridge is Magnum Research (owned by Kahr Firearms Group), in the BFR product line. Prior to January 2019, the only alternative was to have a gunsmith such as ...
The largest factory caliber offered for the Contender was the .45-70, which, although a much larger case than the .308, is still feasible because of the relatively low cartridge pressures of the original black-powder round relative to the limits of the bolt face of the Contender receiver.
The .475 Linebaugh is intended primarily for hunting and defense against big game. The .475 is capable of propelling a 400-grain (26 g) bullet at a muzzle velocity of 1,400 feet per second (430 m/s), developing 1,741 foot-pounds (2,360 J) of muzzle energy from a 5.5" barrel.