Evidently it is possible to rebarrel a Browning A-bolt since there are a few on this site that have been done with no ill effects.
APS/Kirby Allen has at least rebarreled one A-bolt as evidenced by the link above.
I have a Browning A-bolt that some day may get rebarreled. Shoots pretty good as is now. When I get ready to rebarrel, I'll be calling some gunsmiths that I know have rebarreled some A-bolts.
I think there are some misconceptions passed along as fact regarding the Abolt that aren't correct when it comes to customization.
I even had one 'smith tell me on the phone he wouldn't work on the A-bolt because it had "plastic" parts in it..... I've still yet to find "plastic" parts in mine....
I think what it comes down to that it's very easy to tear things up if you really don't have the proper tools and technique to work on certain types of actions (kinda like I am with repairing things.... Seems the more I try to fix, the more I tear up...