I don't know if I wore it out or just broke it so many times it wasn't worth fixing again. This was one of a couple of S&W Model 19s I owned during the hayday of lightweight, highspeed hollowpoints. I had it repaired 4 or 5 times locally, sent it back to S&W twice and hand-carried it back to S&W twice more.
It seems as though the flame cutting effect of those hig speed loads did more than just etch the underside of the topstrap - they cut right through whatever spacing washers that were installed at the end of the cylinder, or whatever they are/were.
I doubt the barrel or cylinder were worn out but the darn thing spent almost as much time in the repair shop as it did on the range. However, the next Model 19 I had seemed like it would go forever - I only shot the standard weight, or heavier, loads through it, not the fast burners. I even wound up shooting metallic silhouette with the darn thing and 200 grain round nose bullets over a charge of 4227 would knock over the ram - from a 4" bbl.
So, I don't know, I think I broke it. Mikey.