Now I read somewhere that Ruger discontinued the security six series of guns because they had problems digesting large amounts of 357 magnum, similar to the K frame Smiths. The result was the development of the GP series, comparable to the Smith L frame. Don, you appear to be very knowledgeable about firearms, but I cannot understand how anyone can say that a Ruger revolver is superior to a S&W by any standard of comparison. The rap on K frames 'shooting loose', is I think vastly overblown. Don't forget the 'combat magnum', was introduced in the mid 1950's, when the steels used in manufacture were not up to todays steels. I think you are right in that a K frame was not designed to digest large amounts of 'hot' magnum rounds, but it will certainly digest more than a box or two. By the way, wasn't the issue with the K frame a matter of forcing cone erosion with hot 125 grain loads? Thanks....Ron