Hi eldequello,

That one I think I did know, with the .30/30 being I think either the first or one of the first all truly sporting cartridges to be loaded with smokeless. But the designation was a holdover from the black powder era. (Which is why Winchester chose to chamber for the very similar .32 Winchester Special...with its slower 1/16" twist....so people that wanted to load with black powder...could.) And many earlier American cartridges were known originally by that method of nomenclature. (Though many were simply originally known by caliber and case length.) And I think the .303 went from blackpowder to cordite?!?

Like vapo said......can get very confusing, (but I find it interesting)!

Thanks again!