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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 result of the quest for a more accurate, flatter shooting .45 caliber cartridge and firearm was the Springfield trapdoor rifle. Like the .50-70, the .45-70 used a copper center-fire case design. A reduced power loading was also adopted for use in the Trapdoor carbine. This had a 55-grain (3.6 g) powder charge.
The Springfield model 1884 was one of the "Trapdoor Springfield" rifles. It was an improved replacement for the previous longarm of the U.S. Armed Forces, the Springfield model 1873 and its variants.
.45-70-405: Action: Trapdoor: Rate of fire: User dependent; usually 8 to 10 rounds per minute ... The Springfield Model 1880 was a trapdoor rifle based on the design ...
Originally, the trapdoor Springfields were created to convert Model 1863 Springfield rifled muskets to breech-loading rifles at a relatively low cost. The Model 1869 Cadet Rifle was a shortened version of the Springfield Model 1868. It had a 29.5 inch barrel, compared to the 32.5 inch barrel of the Model 1868, and had an overall length of 48.8 ...
Springfield Model 1875 – .45-70 caliber trapdoor officer's rifle. [12] Springfield Model 1877 – .45-70 caliber trapdoor carbine. [13] Springfield Model 1880 – .45-70 caliber trapdoor rifle. [14] Springfield Model 1882 – .45-70 caliber trapdoor short rifle. [15] Springfield Model 1884 – .45-70 caliber trapdoor rifle. [16] Springfield ...
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The Springfield Model 1888 was one of several models of rifles produced by Springfield Armory for the United States military in the late 19th century. It was the final design in a long line of rifles which used the trapdoor breechblock design developed by Erskine S. Allin in the 1860s and the last single-shot rifle to see American military service.