.450 Adams
| .450 Adams | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
.450 Adams cartridge | ||||||||||||
| Type | Revolver | |||||||||||
| Place of origin | United Kingdom | |||||||||||
| Service history | ||||||||||||
| In service | 1868–1880 | |||||||||||
| Used by | British military, North-West Mounted Police, colonial military, police forces | |||||||||||
| Production history | ||||||||||||
| Designed | 1868 | |||||||||||
| Specifications | ||||||||||||
| Case type | rimmed straight | |||||||||||
| Bullet diameter | .455 in (11.6 mm) | |||||||||||
| Neck diameter | .475 in (12.1 mm) | |||||||||||
| Base diameter | .477 in (12.1 mm) | |||||||||||
| Rim diameter | .510 in (13.0 mm) | |||||||||||
| Case length | .69 in (18 mm) | |||||||||||
| Overall length | 1.10 in (28 mm) | |||||||||||
| Rifling twist | 1:16 in (410 mm) | |||||||||||
| Primer type | boxer | |||||||||||
| Ballistic performance | ||||||||||||
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| Source(s): Barnes & Amber 1972 | ||||||||||||
The .450 Adams was a British black powder centrefire revolver cartridge, initially used in converted Beaumont–Adams revolvers, in the late 1860s. Officially designated .450 Boxer Mk I, and also known variously as the .450 Revolver, .450 Colt, .450 Short, .450 Corto, and .450 Mark III, and in America as the .45 Webley, it was the British Army's first centrefire revolver round.