The X frame uses the K/L round butt grip frame (exactly the same dimensions and profile), whereas the round butt N grip frame is slightly larger in several areas, so wood grips for an N frame do not, generally, fit the X frame. Wood grips for a round butt K/L frame, on the other hand, do fit properly. If you want to install wood grips on the X frame S&W, I recommend using a round-to-square conversion grip for a round butt K/L frame (the relatively small round butt profile of the K round frame simply looks absurd on the much larger X frame, IMHO). If you shoot with the wood grips installed, you will need the larger (square butt configuration) grips to control the gun, anyway. I have two S&W 500s, as well as many K and N frame guns, and I generally detest rubber grips - everything I have has wood, from K-22s to Model 29s, no problem with even hot loaded .44 mags. The exceptions are my two 500s - they wear the factory Hogue "absorbathane" rubber grips, which are of great assistance in shooting them comfortably. If you do change to wood grips, I recommend you retain the factory absorbathane grips for your X frame, as you may decide to install them for shooting, and the wood for admiring.