Thanks. So it sounds like the K-Frames weren't made for a steady diet of magnums like the L-Frames. That's no problem for me, I would practice mostly with .38 +P's, practice a little with .357's, and then carry .357's. What is the "-7" or "-x", the generation of the model? Does S&W still use the "-x" with their current models? I've never noticed it on either of the two revolvers I have.