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.577/450 Martini-Henry
Snider-Martini-Enfield Cartridges
(From Left to Right): A .577 Snider cartridge,
a Zulu War-era rolled-brass-foil .577/450 Martini-Henry Cartridge, a later drawn-brass .577/450 Martini-Henry cartridge, and a .303 British Mk VII SAA Ball cartridge.
Type Military
Place of origin 22x20px United Kingdom
Service history
Used by British Empire
Wars Anglo-Zulu War
Production history
Designed 1871
Variants 11.43×60R (61R)
Specifications
Parent case .577 Snider
Bullet diameter .455 in (Bad rounding hereScript error mm)
Neck diameter .487 in (Bad rounding hereScript error mm)
Shoulder diameter .628 in (Bad rounding hereScript error mm)
Base diameter .668 in (Bad rounding hereScript error mm)
Rim diameter .746 in (Bad rounding hereScript error mm)
Rim thickness .06 in (Bad rounding hereScript error mm)
Case length 2.34 in (Bad rounding hereScript error mm)
Overall length 3.12 in (Bad rounding hereScript error mm)
Ballistic performance
Bullet weight/type Velocity Energy
400 gr (Bad rounding hereScript error g) lead1,450 ft/s (Bad rounding hereScript error m/s)1,868 ft·lbf (Bad rounding hereScript error J)
480 gr (Bad rounding hereScript error g) lead1,350 ft/s (Bad rounding hereScript error m/s)1,943 ft·lbf (Bad rounding hereScript error J)
Source(s): Handbook for Shooters & Reloaders[1]
Handloaders Manual of Cartridge Conversion[2]

The .577/450 Martini-Henry was a black powder, centrefire round used by the British and British Empire militaries prior to the adoption of the .303 calibre cartridge used in the Lee-Metford, Martini-Enfield, and Lee-Enfield series of rifles alongside the Nepalese Bira gun.[1] This cartridge is also sometimes known as 11.43×60R (61R).[2]

BackgroundEdit

The .577/450 was based upon the same separate steel head used for the .577 Snider cartridge, with a wrapped foil body firing a nominally .45 calibre bullet, giving the cartridge a "bottle-necked" appearance. Initially, .577/450 cartridges were manufactured of rolled brass foil with an iron rim, but later on—shortly after the Anglo-Zulu War—it was discovered that the rolled foil cartridges were prone to jamming as the barrel heated up, and production was switched to the drawn brass style now commonly used for the manufacture of small arms ammunition.

The Martini-Henry single-shot lever action rifle had a Martini-designed action married with the unique rifling designed by Alexander Henry. The first three patterns or "Marks" were equipped with a shorter lever, which was extended in the Mark IV pattern to address extraction problems in some climates. The Mark IV was the final and most refined form of the rifle in .577/450, but was already obsolete owing to the pending adoption of a smokeless powder small bore cartridge, which became the .303.

UsesEdit

The cartridge was most famously employed by British Forces during the Anglo-Zulu War of 1879—which included the Battle of Isandlwana and the Battle of Rorke's Drift—as well as during the Sudanese Campaign of 1884–1898, and in various other colonial conflicts in Africa and India. By the end of the 19th Century the .577/450 Martini-Henry cartridge was considered obsolete, though it was still in military production as late as World War I (for use by Royal Flying Corps observers and Zeppelin-buster aircrews, using an incendiary spitzer bullet), and in commercial production by Kynoch until the late 1950s.

the load used by the military was 85 grains (Bad rounding hereScript error g) of black powder with a 480-grain (Bad rounding hereScript error g) bullet at 1,350 ft/s (Bad rounding hereScript error m/s).[1]

See alsoEdit

ReferencesEdit

  • Cartridges of the World 4th Edition, by Frank C. Barnes, DBI Books, p. 214.
  1. 1.0 1.1 1.2 Script error
  2. 2.0 2.1 Script error

External linksEdit

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