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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.
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 .460 S&W, which is a .45 caliber case slight longer than the .500 S&W, takes nearly the same bullets as the .45-70 (.452 vs. .458), and is a virtual twin to the .45-70 performance-wise. Even the guy at S&W who developed the .500 and .460 thinks the .460 is a better hunting cartridge (see here ).
In general, loads close to 100% density (or even loads where seating the bullet in the case compresses the powder) ignite and burn more consistently than lower-density loads. In cartridges surviving from the black-powder era (examples being .45 Colt , .45-70 Government ), the case is much larger than is needed to hold the maximum charge of high ...
The user then adjusts the iron sights or scope reticle to align the point of aim with the projected laser dot. Another more commonly used type of laser boresighter is attached to the muzzle of the barrel, either inserted straight into the bore ("arbor" type) or held in alignment with the barrel via a magnet, and projects a laser beam onto the ...
The Model 1874 rifles and carbines were available in a variety of calibers, including .45-70, .45-110, and .45-120. Action: Falling block: Rate of fire: 8–10 shots per minute: Muzzle velocity: 1,200 ft/s (370 m/s) Effective firing range: 1,000 yd (910 m) Maximum firing range: 3,000 yd (2,700 m) Feed system: Breech-loading: Sights: Open ladder ...
For the Model 1880 rifle, Springfield Armory departed from previous bayonet designs and attempted to produce a combination bayonet and cleaning rod. The bayonet was of the triangular style, as the trowel type had recently fallen out of favor. Approximately 1,000 of the Model 1880 rifles were produced and were fielded for testing.
Springfield Model 1888, trapdoor mechanism open. In firearms, a trapdoor is a form of breech-loading mechanism for rifles in which a hinged breechblock rotates up and forward, resembling the movement of a trapdoor. [1] The Springfield models 1865 and 1873 were best known for first employing this type of action. [2]