Maybe a picture would help. Is it for sure the groove hanging it up or is there possibly a burr in the metal from the wear and tear? And if the hole in the frame is out of round, I suppose they might have to install a bushing there like on the firing pin hole. But that is a guess. I have never seen a Smith worn out from loading! That is alot of handling for sure! And a shame too.
Your gun is like your nose, it is just wrong for someone else to pick it for you!