I second this opinion. You can shoot all the 38+p your heart desires as well as some light-for-caliber magnum ammo on occasion if you so desire, but as a rule stick with 158 grains and up . It's what the K-frame was designed to shoot. Too many of the lighter, shorter (and inevitably hotter) bullets and you risk cracking the forcing cone. Nobody knows for sure how many it will take for any given gun, so why risk it? The controversy is well-documented. However, don't think of it as an inherent "weakness" in the K-frame, but rather as the price to pay for the excellent power/weight compromise that a K-frame magnum revolver represents. If you plan on shooting 38 and 357 in the same session, it may seem logical to "warm up" with the 38 spl and then move on to the 357, but 38 spl will leave a dirty ring near the end of the cylinder; start with the 357 and the cases will be easier to eject.