 | This article needs additional citations for verification. (January 2013) |
| .475 Linebaugh | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Type | Handgun | |||||||||||
| Place of origin | United States | |||||||||||
| Production history | ||||||||||||
| Designer | John Linebaugh | |||||||||||
| Designed | 1988 | |||||||||||
| Variants | .475 Maximum | |||||||||||
| Specifications | ||||||||||||
| Parent case | .45-70 | |||||||||||
| Case type | Semi-rimmed, straight | |||||||||||
| Bullet diameter | .475 in (12.1 mm) | |||||||||||
| Neck diameter | .504 in (12.8 mm) | |||||||||||
| Base diameter | .504 in (12.8 mm) | |||||||||||
| Rim diameter | .540 in (13.7 mm) | |||||||||||
| Rim thickness | .065 in (1.7 mm) | |||||||||||
| Case length | 1.4 in (36 mm) | |||||||||||
| Overall length | 1.77 in (45 mm) | |||||||||||
| Case capacity | 50.3 gr H2O (3.26 cm3) | |||||||||||
| Primer type | Large pistol | |||||||||||
| Maximum pressure | 50,000 psi (340 MPa) | |||||||||||
| Ballistic performance | ||||||||||||
| ||||||||||||
| Test barrel length: 5.5" Source(s): "Cartridges of the World"[1] | ||||||||||||
The .475 Linebaugh (12.1x36mmR) is a rimmed revolver cartridge developed by John Linebaugh in the late 1980s in response to the scarcity of the .348 Winchester brass required to form his .500 Linebaugh cartridge.[2] The cartridge is based on the .45-70 Government case trimmed to 1.4 inches and loaded with .475-inch-diameter (12.1 mm) bullets. While dimensionally similar to the older .45 Silhouette cartridge, the .475 Linebaugh is loaded to considerably higher pressures, resulting in significantly different ballistic performance.
The .475 Linebaugh was first announced in the May 1988 issue of Guns & Ammo in an article written by Ross Seyfried. In 1991, Linebaugh announced a 1.6 inch variant of the .475 Linebaugh for use in converted Ruger .357 Maximum revolvers. This cartridge is known as the .475 Linebaugh Long or .475 Linebaugh Maximum, and produces somewhat greater ballistic performance than the shorter round.[3]
- ^ Barnes, Frank C. (2003) [1965]. Skinner, Stan (ed.). Cartridges of the World (10th ed.). Iola, WI, USA: Gun Digest Books. ISBN 978-0-87349-605-6.
- ^ Taffin, John (2017-10-04). "Reloading The .480 Ruger". GUNS Magazine. Retrieved 2022-11-17.
- ^ Prasac, Max (2017-03-10). "Big-Game Medicine: The .475 Revolver Cartridges". Gun Digest. Retrieved 2022-11-17.