.32 Long Colt
| .32 Long Colt | ||||||||||||||||
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.32 Long Colt (left) and .32 S&W Long (right) | ||||||||||||||||
| Type | Revolver | |||||||||||||||
| Place of origin | United States | |||||||||||||||
| Production history | ||||||||||||||||
| Designed | 1873 | |||||||||||||||
| Produced | 1873–present | |||||||||||||||
| Specifications | ||||||||||||||||
| Parent case | .320 Revolver | |||||||||||||||
| Case type | Rimmed, straight | |||||||||||||||
| Bullet diameter | .312 in (7.9 mm) | |||||||||||||||
| Neck diameter | .313 in (8.0 mm) | |||||||||||||||
| Base diameter | .318 in (8.1 mm) | |||||||||||||||
| Rim diameter | .374 in (9.5 mm) | |||||||||||||||
| Case length | 0.92 in (23 mm) | |||||||||||||||
| Overall length | 1.26 in (32 mm) | |||||||||||||||
| Rifling twist | 1:16 in (410 mm) | |||||||||||||||
| Primer type | small pistol | |||||||||||||||
| Ballistic performance | ||||||||||||||||
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| Sources: Barnes & Amber 1972 | ||||||||||||||||
.32 Long Colt (also known as .32 LC or .32 Colt) is an American rimmed centerfire revolver cartridge introduced in 1873 by Colt. It was developed from the earlier .320 Revolver cartridge and intended for use in small-frame Colt revolvers.
The cartridge was manufactured in several bullet configurations during its production history but saw wider use in Europe than in North America. Despite being similar in appearance and performance to the .32 Smith & Wesson Long, the two cartridges are not interchangeable due to differences in case and bullet dimensions. The .32 Long Colt is no longer in common use but is still produced in small quantities for older firearms.