I recently shot my 686 and, after cleaning it, reassembled the cylinder/crane. Oddly, I couldn't get the cylinder to fit back into the frame. After fiddling with it for awhile, it did go back in. However, now, even though the cylinder will rotate when I dry fire the revolver, it is difficult to open/close the cylinder. The back for the ejection rod seems to be scoring the frame by the firing pin. Is this common? I don't think I did anything to damage the revolver when firing it (factory ammo, etc.).