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.38 Long Colt
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Caliber Specifications:
Caliber: | .38 Long Colt |
Standard / Datasheet: | C.I.P. |
Bullet Diameter: | 0.353" | 8.97mm |
Primer Size: | Small Pistol (SP) |
Max. Case Length: | 1.035" | 26.29mm |
Max. Cartridge Length / OAL: | 1.360" | 34.54mm |
Max. Standardized Pressure: | 13053 psi | 900 bar |
Case Capacity: | 17.3 Grains of Water | 1.12 cm3 |
CID: | CID_581 |
Last updated: | 2/20/2025 |
- The .38 Long Colt is a revolver cartridge that was introduced in 1875 and was used by the United States military from 1892 to 1909. It was designed by Colt's Manufacturing Company and was intended to be a replacement for the .36 caliber percussion revolvers that were then in use.
The .38 Long Colt cartridge has a bullet diameter of .357 inches and a case length of 1.06 inches. It has a relatively low velocity of around 800 feet per second, which limits its effectiveness for self-defense or military use.
While the .38 Long Colt was once a popular cartridge, it has largely been replaced by more modern cartridges with better ballistics. Today, it is primarily used by enthusiasts of antique firearms and for historical reenactments. 
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Weight vs. Velocity - Suitable Bullets for this Caliber
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Barrel Length Variation vs. Velocity - by Bullet Weight
.38 Long Colt load data available with the following bullets:
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