INERT DEACTIVATED. The .33 Rimless Nitro Express is known by the designation .33 Jeffery. The cartridge was developed in 1908 by the British gunmaker W. J. Jeffery & Co. for use in bolt-action rifles. The cartridge is also called the .33 BSA and is a rimless cartridge for magazine-fed rifles, developed cartridge and designed for hunting large game. This is an original Kynoch .33 Belted Rimless Nitro Express carton of 10 big game rifle cartridges. The brass cased rounds are headstamped BSA .33 K (Kynoch). and are crimped onto a 165 grain semi pointed soft nosed nickel jacketed bullet. The primers are made of brass. The price includes UK delivery and no licence is required to possess this inert round in the UK if retained as part of a collection or display. Sn 22787:20