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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.
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.
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]
Download as PDF; Printable version; ... .45-70-405: Action: Trapdoor: Rate of fire: ... The Springfield Model 1875 was a variant of the Springfield Model 1873 rifle.
The Model 1868 was also the first trapdoor conversion to use the cartridge extractor covered by U.S. Patent No. 68,009, issued August 27, 1867 to W.H. & G.W. Miller. The Model 1868 had an overall length of 51 7 ⁄ 8 inches. [1] Over 50,000 Model 1868 rifles were manufactured, chambered for the .50-70 450 cartridge.
Rather than re-tool their production equipment to make an item that was now considered obsolete, Springfield Armory chose instead to modify the Model 1873 to use a new bayonet system. [ 1 ] In the days of smooth bore muskets , bayonets had played a considerable role on the battlefield, often accounting for many of battlefield casualties.
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 ...
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 ...