For all I know....these parts could have came from a range-gun, but I am sure it was well-fired. Probably thousands and thousands of times. The good news is that from what I think I have leaned, the internal bore of the cylinder is the weakest link in the chain. I would have expected the yoke-rod to wear before the cylinder, but it is also likely that this yoke had been replaced before...who knows. I think I will make an attempt to fashion a stainless steel washer to install as a bearing. Since the end-shake is so severe, I can almost make a standard .010 washer work.

The same thing happens on any revolver, be it steel or aluminum. If it is fired enough, it will develop end-shake as the rod pounds the rear of the cylinder under recoil and with the heavy magnums, frame stretch comes into play......just takes a little longer on a steel gun I suppose.