The 404 Jeffery was introduced by W.J. Jeffery in 1909. It was vastly popular for many years, and then died slowly over many decades. It now has a new lease on life due to both new rifles and ammunition in this caliber. The 404 made a great name for itself in Africa, where inexpensive bolt rifles let its performance be experienced by those who could not afford a double-barrel rifle for one of the 400 NE�s. With the standard 400-grain bullet, the 404 was a very popular general-purpose cartridge in Africa and India. Properly used, it is adequate for any game found here. It is somewhat overpowered for North American game and lacks the flat trajectory and long-range potential necessary for such hunting. The 404 is a good cartridge for hunting bear or other big game at close quarters. 

This text is based on information from “Cartridges of the World”, Hodgdon reloading manual, the cartridge designer and/or own resources.