In the "Standard Catalog of Smith & Wesson"' 4th edition, at the top of page 204 there is a statement "Frames are slightly different between heavy barrel and tapered barreled variations." Does this mean that the Model 10 with a heavy barrel uses a different grip then one with a tapered barrel. I have a Model 10-8, 5D serial number, that I cannot find grips to fit. Any help with this would be appreciated.