The 500 Wyoming Express was developed in 1995 for the Freedom Arms Model 83 revolver. It was a new design with a belted case and not based on any existing cases. The reason for the belted case was for the cartridge to headspace on the belt which would allow a heavier crimp on the bullet so that there is no ‘creep’ in the cases where bullets move during recoil, similar to some of the old British big bore cartridges, and secondly the ratchet system (or pattern) of the Freedom Arms cylinder is tight and therefore a large rimmed cartridge (like the 500 Linebaugh) would not fit as the rims would overlap.