What I read was on some forum - don't recall which - but the poster was saying that motor oil applied to the frame would start to smoke heavily when it reached 350°F under the flame of a propane torch - that being a safe temperature for preserving the integrity of the steel.
They suggested heating the frame - which would swell and the barrel would come out easily.
Can't comment as to what problems this could cause - only recalling here, what I've read elsewhere on the internet.
Clearly - if I ever need to do this I'll try your method first as it seems it poses the least threat to the gun itself.
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