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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.
.45 Colt.45-70 Government.45-90 Sharps.45-70 Auto; 45 Raptor.450 Bushmaster.450 Black Powder Express.450/400 Black Powder Express.450/400 Nitro Express.500/450 Magnum Black Powder Express.450 Marlin.450 Nitro Express.500/450 No 1 Black Powder Express.450 No 2 Nitro Express.454 Casull.500/450 Nitro Express.450 Rigby.450 Dakota.450 Watts Magnum
The Henry Single Shot rifle is also available in hardened brass or steel in over 10 centerfire calibers. Henry Repeating Arms released the Side-Gate lever-action rifle chambered in .30-30 Win, .38-55 Win, .35 Rem, and .45-70 Gov't in 2018.
The unrelated Henry Repeating Arms produces a modernized replica of the Henry Model 1860 rifle with brass receiver and American walnut stock, but a modern steel barrel and internal components. [14] Uberti produces an almost exact copy Henry Model 1860 chambered in .44-40 Winchester or .45 Colt, rather than the original .44 Henry rimfire.
According to the US Army Ordnance Department tests, the 45-70-405 was loaded to 19,000 psi, [4] while the 45-70-500 was loaded to 25,000 psi [2] The average accuracy of the Springfield Model 1873 was a circle with an average radius of 1.7 inches at 100 yards, corresponding to an ~3.4 MOA.
The total production was 112,000 for all models. Calibers were: .45 Peabody rimfire; .45-70 Government; .50 rimfire; 50-70; 11 mm Spanish; 10.4 mm rimfire Swiss. Barrel length carbine 20", rifle 33". Finish: Receiver casehardened, barrel blued, iron mountings, walnut stock. The majority of Peabody's production was for foreign contracts.
Originally chambered for the new .45-75 Winchester Centennial cartridge (designed to replicate the .45-70 ballistics in a shorter case), the Model 1876 also had versions in .40-60 Winchester, .45-60 Winchester and .50-95 Express; the '76 in the latter chambering is the only repeater known to have been in widespread use by professional buffalo ...
The ballistic performance of a .577/450 is somewhat similar to that of an American .45/70 Government round, as used prolifically throughout the American Frontier West and by buffalo hunters, though the .577/450 has more power due to its extra 15 grains of black powder inside the cartridge case.