.40-60 Win.

The .40-60 Winchester cartridge is an obsolete centerfire rifle cartridge that was developed by Winchester Repeating Arms Company in the 1870s. It was designed for use in single-shot, lever-action, and slide-action rifles.

The .40-60 Winchester cartridge features a rimmed brass case with a bullet diameter of .406 inches (10.31 mm) and a case length of 2.5 inches (63.5 mm). It typically uses a 210-grain (14 g) lead bullet propelled by a black powder charge.

The .40-60 Winchester cartridge was popular among hunters and shooters in the late 19th century, and it was used to take a variety of game, including deer, elk, and bear. However, the cartridge was eventually replaced by newer, more powerful cartridges, such as the .30-30 Winchester and the .45-70 Government, and it fell out of favor.

Today, the .40-60 Winchester cartridge is considered to be an obsolete and rare cartridge, and it is primarily used by collectors and antique firearms enthusiasts.