Removed the barrel on a nice S&W .44 Spcl that was really stuck with 85 years of old oil and fouling. I took my time and soaked it in KROIL for several DAYS. Used a set of oak block with a groove cut slightly smaller than the barrel, as well as some rosin, firmly pressed in a good bench vice. Twisted off easily.
Take Your time, use the right tools and don't rush it.