.38 Long Colt is a centerfire handgun cartridge designed by Colt’s Manufacturing Company in 1875 for use in their revolvers. It was the first cartridge to be used in the Colt Single Action Army revolver, also known as the “Peacemaker.”
The .38 Long Colt cartridge is typically loaded with a 150-grain bullet and has a muzzle velocity of around 750 feet per second. It was originally designed as a military cartridge, and saw use in the Spanish-American War, the Philippine-American War, and other conflicts in the late 19th and early 20th centuries.
Today, the .38 Long Colt is less commonly used, as more powerful cartridges have become more readily available. However, it is still occasionally used for target shooting, historical reenactments, and other specialized applications.
It is important to note that the .38 Long Colt cartridge is not interchangeable with the more common .38 Special cartridge, as they have different case lengths and diameters. Attempting to use .38 Long Colt ammunition in a .38 Special revolver, or vice versa, can result in malfunction or damage to the firearm.