45 Colt (often called .45 Long Colt) is a large-bore centerfire revolver cartridge dating to the 1870s, used in single-action revolvers and lever guns for defense, hunting, and cowboy-action shooting.

45 Colt is a historic large-diameter revolver cartridge firing a heavy bullet at modest velocity, giving a strong but generally manageable recoil impulse in heavier revolvers. It remains popular for cowboy-action competition, recreational shooting, and some defensive and hunting use, particularly in single-action revolvers and lever-action rifles. Ammunition is available but in a narrower selection and often at higher cost than the most common handgun cartridges. It suits enthusiasts of traditional revolvers and lever guns and those drawn to a classic big-bore cartridge.

General information about this caliber — not a recommendation for this specific firearm.