https://www.rugerforum.com/threads/single-action-grip-frames-explained.131343/If you go to the revolver section I think it may become more clear. I'm no expert though for sure on the wheel guns.Dumb question... will these fit a New Vaquero? Midway's description says "Bisley Vaquero (Large Frame)".When I see "large frame", I think of the two digit prefix Blackhawks and Vaqueros not the smaller New Vaquero or three digit prefix frames.