Usually, when cleaning up the action, you square the face, open and clean up the threads, lap the lugs, etc. A barrel that was taken off might not fit going back on if you open up the threads to clean them up, and squaring the face can set the barrel back a few thousandths.
So, no, I never have.
I had an R700 action (old .30-06) that I paid a Smith to true, install aftermarkey recoil lug, and had a 28" #4 Shilen Match barrel put on and chambered to .25-06AI. It was a solid .5MOA rifle after years of load work up, with 3 different bullets, 100SMK, 100TTSX, 115HVLD. After 14 years and a lot of rounds, I rebuilt it last year to .280AI. When the new smith took it apart, the above photo was what he found. Action still had out of square face, factory threads, factory recoil lug. He trued it up, installed new .250" recoil lug, new 26" Proof Sendero Light barrel and chambered it to. 280AI. It is now a solid .3MOA rifle. With 3 different bullets. 145LRX, 160TMK, 175 Elite Hunter. Not sure if the truing helped, better barrel, or just better smith practices, but it is a shooter for sure.