.38 Long Colt Load Data & Reloading Guide

The .38 Long Colt cartridge originated in the late 19th century and was officially adopted by the United States Army in 1892. It was developed as an improvement over earlier black powder revolver cartridges, offering a transition to smokeless powder utilization. Initially, it saw extensive use in military revolvers; however, its relatively modest performance compared to other contemporary cartridges soon led to its replacement by more powerful options, such as the .45 ACP, after the turn of the century.

Technically, the .38 Long Colt features a bullet diameter of .357 to .358 inches and a case length of 1.03 inches. The cartridge operates at a modest pressure level, typically around 12,000 psi, which is significantly lower than modern high-performance calibers. This makes it particularly suited for use in older revolvers where high pressure could pose risks. Typical factory ammunition offered a 150-grain round nose lead bullet, achieving muzzle velocities in the range of 750 to 800 feet per second from standard-length revolver barrels.

In terms of ballistic performance, the .38 Long Colt is known for its mild recoil and moderate accuracy at short to medium distances, making it suitable for historical reenactments and cowboy action shooting. It provides a pleasant shooting experience due to its lower pressure, which also contributes to a longer firearm life, especially for vintage weapons. For reloaders, the caliber is appealing due to its straightforward case design, the availability of case components, and its compatibility with a wide range of smokeless powder loads.

Reloaders benefit from the .38 Long Colt due to its flexible reloading options and historical significance. While there is a variety of bullet weights that can be utilized, reloaders often experiment with bullets weighing between 125 and 158 grains to fine-tune personal performance preferences in terms of accuracy and recoil. The cartridge also serves as an excellent training ground for newcomers interested in historical cartridge reconstruction, offering a hands-on opportunity to understand the transition from black powder to smokeless powder systems.