What is .450-400 nitro express?

The .450-400 Nitro Express is a British rifle cartridge developed in the late 19th century for hunting large game in Africa and India. It is also known as the .400/375 or .400 Jeffery Nitro Express.

The cartridge fires a .41 caliber (10.4mm) bullet weighing between 300-410 grains at a muzzle velocity of around 2,050 to 2,150 feet per second. The casing has a length of 2.75 inches, with a rimmed design that allows for reliable extraction in the field.

It was popular among hunters in the early 20th century but has since been largely replaced by more modern cartridges. However, it is still used by some hunters and collectors today for hunting and shooting sports such as vintage rifle competitions.

The .450-400 Nitro Express is considered a powerful cartridge for large game hunting such as elephant, buffalo, and hippopotamus. Its recoil can be heavy and requires a sturdy rifle and careful handling.