One simply has to wonder how a cast iron or Hardened steel shaft can wear while runnng in "Soft" Babbit, yet they most certainly do.
Personally there are "Five" methods I would consider for putting a gun of mine back on face; #1- Shim the thing, #2- replace the pin, #3- Tig the hook, #4 fit an insert in hook, #5- Tighten the ball screw (Lefever Only).
The choice would depend "Soley" on the individual gun in question. I would not spend $300+ on a 12ga Crescent or JABC though I might have one, which for whatever reason I desired to shoot occasionally (It would likely get a shim). Replacing the pin would be my next choice if feasibale. (It's not always). Last I would build up the hook by either of the methods mentioned.
Sometimes practicality has to take precidence over "Ultimate Theory".
