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| .577/450 Martini-Henry colspan="3" style="text-align: center; font-size: 90%; border-bottom: 1px solid #aaa; line-height: 1.25em;"
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| 300px
(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 UK colspan="3" style="background: lightsteelblue; text-align: center; vertical-align: middle;"
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| Service history Used by British Wars Anglo-Zulu War colspan="3" style="background: lightsteelblue; text-align: center; vertical-align: middle;"
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| Production history Designed 1871 Variants 11.43 x 60R (61R) colspan="3" style="background: lightsteelblue; text-align: center; vertical-align: middle;"
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| Specifications Parent case .577 Nitro Express Bullet diameter .455 in (Expression error: Unexpected < operator.
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 mm
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Neck diameter .487 in (Expression error: Unexpected < operator.
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 mm
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Shoulder diameter .628 in (Expression error: Unexpected < operator.
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 mm
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Base diameter .668 in (Expression error: Unexpected < operator.
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 mm
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Rim diameter .746 in (Expression error: Unexpected < operator.
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 mm
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Rim thickness .06 in (Expression error: Unexpected < operator.
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 mm
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Case length 2.34 in (Expression error: Unexpected < operator.
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 mm
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Overall length 3.12 in (Expression error: Unexpected < operator.
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 mm
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colspan="3" style="background: lightsteelblue; text-align: center; vertical-align: middle;"
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| Ballistic performance Bullet weight/type Velocity Energy style="vertical-align:middle; border-bottom: 1px dotted #aaa;
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" | 400 gr (Expression error: Unexpected < operator.
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 g)
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"|1,450 ft/s (Expression error: Unexpected < operator.
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" | 480 gr (Expression error: Unexpected < operator.
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"|1,350 ft/s (Expression error: Unexpected < operator.
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Source: Handbook for Shooters & Reloaders[1]
Handloaders Manual of Cartridge Conversion[2]

The .577/450 Martini-Henry was a black powder, centerfire 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. [1] This cartridge is also sometimes known as 11.43x60R (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, 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

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, 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), and in commercial production by Kynoch until the late 1950s.

Handloaders typically use .45-70 loading data for this cartridge, the load used by the military was 85 grains of black powder with a 480 grain bullet at 1350 ft/s. [1]

CategoriesEdit

Cartridge:rifles
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