Good or no good ?

[NORTHOF60]

Would i be right in assuming the scaling we see on the receiver is a result of intense heat ?
Haven't tried to scrape it off or anything ... yet.
There is a little of that scaling on the chamber portion of the barrel, but not too much... way less than on the receiver.
Almost look like the bluing got burnt off ... it's weird.

The heat caused by brazing would definitely leave scaling. If you had access to a bore scope, you could check the chamber and throat for indications of scaling. One of my books states that you can use an acetylene torch as long as you keep the temperature to the point that the colour of the bluing outside the contact point is not affected (the topic was annealing two (2) points on the top of a Mauser 98 receiver ring (notorious for being heat treated extremely hard on the surface, but dead soft internally) so that it could be drilled for tapping, and also involved using heat sinks. The writer stated that you shouldn't be able to cut the Mauser receiver ring with a file if it was properly heat treated). Under the circumstances you describe, unless the barrel has extremely valuable assets (pristine bore, special markings, rarity), or you're just suffering from Covid madness and want something to occupy yourself, salvaging the barrel is probably a lost cause.

After reading many of your posts, I believe that half of your motivation is the challenge. Personally, I've never removed the barrel from anything that wasn't a "take-down" model, although I've read the mechanics and methods involved. It could prove to be a learning experience, even if the barrel can't be salvaged.