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[ArcCW] Martini-Henry

The Martini-Henry is a breech-loading single-shot lever-actuated rifle that was used by the British Army. It first entered service in 1871, eventually replacing the Snider-Enfield, a muzzle-loader converted to the cartridge system. Martini-Henry variants were used throughout the British Empire for 47 years. It combined the dropping-block action first developed by Henry O. Peabody (in his Peabody rifle) and improved by the Swiss designer Friedrich von Martini, combined with the polygonal rifling designed by Scotsman Alexander Henry. In the original chambering, the rifles fired a round-nosed, tapered-head .452-inch, soft hollow-based lead bullet, wrapped in a paper patch giving a wider diameter of .460 to .469-inch; it weighed 485 grains. It was crimped in place with two cannelures (grooves on the outside neck of the case), ahead of 2 fibre card or mill board disks, a concave beeswax wad, another card disk and cotton wool filler. This sat on top of the main powder charge inside initially a rimmed brass foil cartridge, later made in drawn brass.The cartridge case was paper lined so as to prevent the chemical reaction between the black powder and the brass. Known today as the .577/450, a bottle-neck design with the same base as the .577 cartridge of the Snider-Enfield. It was charged with 85 grains (5.51 g) of Curtis and Harvey's No.6 coarse black powder, notorious for its heavy recoil. The cartridge case was ejected to the rear when the lever was operated. The rifle was 49 inches (1,245 mm) long, the steel barrel 33.22 inches (844 mm). The Henry patent rifling produced a heptagonal barrel with seven grooves with one turn in 22 inches (559 mm). The weapon weighed 8 pounds 7 ounces (3.83 kg). A sword bayonet was standard issue for non-commissioned officers; when fitted, the weapon extended to 68 inches (1,727 mm) and weight increased to 10 pounds 4 ounces (4.65 kg).