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  2. .50-70 Government - Wikipedia

    en.wikipedia.org/wiki/.50-70_Government

    Derived from the .50-60-400 Joslyn, the cartridge was developed after the unsatisfactory results of the .58 rimfire cartridge for the Springfield Model 1865 rifle. The .50-70 Government cartridge used the Benét internal center-fire primer design and became the official cartridge of the U.S. military in 1866 until being replaced by the .45-70 Government in 1873.

  3. Springfield Model 1866 - Wikipedia

    en.wikipedia.org/wiki/Springfield_Model_1866

    Springfield Model 1866 breech. The Springfield Model 1866 was the second iteration of the Allin-designed trapdoor breech-loading mechanism. Originally developed as a means of converting rifle muskets to breechloaders, the Allin modification ultimately became the basis for the definitive Springfield Model 1873, the first breech-loading rifle adopted by the United States War Department for ...

  4. Springfield Model 1868 - Wikipedia

    en.wikipedia.org/wiki/Springfield_Model_1868

    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.

  5. Springfield Model 1869 - Wikipedia

    en.wikipedia.org/wiki/Springfield_Model_1869

    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 ...

  6. Springfield model 1873 - Wikipedia

    en.wikipedia.org/wiki/Springfield_model_1873

    The average accuracy of the Springfield Model 1884 was a circle with an average radius of 1.3 inches at 100 yards, corresponding to ~2.6 MOA. [5] Therefore, the accuracy potential of the average Springfield Model 1884 is comparable to that of the German K98k or Springfield's later M1 Garand. Accuracy chart for the Springfield Model 1884

  7. Springfield model 1870 - Wikipedia

    en.wikipedia.org/wiki/Springfield_model_1870

    The original trapdoor Springfields had replaced only the firing mechanism, and had used a barrel liner to reduce the caliber from .58 to .50. This barrel liner proved to be unreliable in the field, and later trapdoor Springfields, like the Model 1870, abandoned the barrel liner method and used newly manufactured barrels instead. [1]

  8. Trapdoor mechanism - Wikipedia

    en.wikipedia.org/wiki/Trapdoor_mechanism

    Springfield Model 1866, trapdoor breech closed. In 1872–1873 a military board, headed by Brigadier-General Alfred H. Terry, conducted an examination and trial of 99 rifles from several domestic and foreign manufacturers, including those from Springfield, Sharps, Peabody, Whitney, Spencer, Remington, and Winchester pursuant to the selection of a breech-loading system for rifles and carbines ...

  9. Springfield Model 1865 - Wikipedia

    en.wikipedia.org/wiki/Springfield_Model_1865

    The hinged breechblock caused these rifles to be named "Trapdoor Springfields". Approximately 5,000 Civil War Model 1861 rifled muskets were converted at the Springfield Armory in 1866. It soon became apparent that many of the small working parts in the breech system were not going to have a long service life, and the action was too complicated ...