Merlin,
The 625-3 I have as my now practice gun, was my main gun for 5 years I know has 200k through it. Like Carmoneys 25 it too has an oblonged center pin hole. I had to put a Firing pin in it this year, and about a month after I aquired it I had to put a cylinder on it after I double charged it. It still has the factory cylinder stop (window is pretty slopy now) and I found out the hard way the star fingers don't like a deep chamfer. (had to replace the star after breaking 3 fingers).
Other than that it is good to go. I shoot 90+% lead through the gun so the barrel looks good and it still groups 2 inches at 25 yds, plenty good for what we do.
HOP