.400 Jeffery Nitro Express

The .400 Jeffery Nitro Express or .450/400 3-inch Nitro Express is a medium bore, bottlenecked, Nitro Express cartridge designed by W.J. Jeffery & Co in 1902, intended for use in single shot and double rifles.

.400 Jeffery Nitro Express

The .400 Jeffery Nitro Express or .450/400 3-inch Nitro Express is a medium bore, bottlenecked, Nitro Express cartridge designed by W.J. Jeffery & Co in 1902, intended for use in single shot and double rifles.