Poor Private said:
Great way to answer the question.
Now Zoni answer the next question that will be asked.
Can it be repaired back to what it was if this occurs?
You Asked For It. (Hey, remember that show? I know, I'm showing my age.)
Oh, to answer the question, I don't know of any way to fix a stretched closed frame or a semi-pulled out cylinder pin.
Also, I don't know of any way to weld or braze up a battered frame at the rear of the cylinder although there may be some brass brazing rod that would melt at a lower temperature. The big problem would be trying to figure out which brass the frame was made from and then trying to re-machine the surface.
Shooting a closed top revolver that has been stretched isn't too risky with light loads but the accuracy won't be very good.
It will also spit a lot of powder gas out the sides of the gun.
With the Colts there might be a little bigger risk though.
When the brass that holds the cylinder pin in place (the threads) starts to move, some kinds of brass will continue to move. Others will work harden which sounds pretty good until you realize that in a work hardened condition the metal may crystallize and break suddenly.
IMO, the best thing to do with a brass framed revolver that has been stretched or battered is to either relegate it to a wall hanger or salvage all of the usable parts for use on your next (steel) framed gun. The parts will interchange.