Can a K frame S&W handle a steady diet of warm factory 357 loads? Or should those warm loads be saved for the "L" and "N" frames. This was a recent discussion at a local gun shop. My feeling is that they can, have and will. I know of a 19 and a 66 that have been shot very regularly for many years using red and white box Winchester USA ammo. Both guns are as tight as some of the brand new ones.