The evolution in Mississippi, as in Louisiana, went from;

iron sighted muzzle loaders, to

scope sighted muzzle loaders, to

single shot, breech loading, metallic cartridge rifle with metallic cartridges loaded with either black powder or modern smokeless powder, .38 caliber or larger, of a kind or type manufactured prior to 1900 and replicas, and reproductions or reintroductions of that type rifle having an exposed hammer, to

single shot, breech loading rifles, .35 caliber or larger having an exposed hammer that uses metallic cartridges, to

the current change of NO RESTRICTIONS. (Louisiana hasn't taken this step yet. But it will happen sooner or later.)