Some times when the collet bushing fails it jams up so tight it takes mutipal hard smacks with a rawhide hammer to get the gun apart. I understand the inside of the slide take a pretty bad beating. I was lucky mine just broke and came out easily. I got several thousand round with before it broke. I replaced it with a Wison with no lose in accuracy.
Don't know much about the new ones. I got mine in 1972.
Good Luck,
Tater