I found the best, simplest and fastest way to remove the barrel is to set the action wrench to the 10 o'clock position as you stand behind the rifle. Take a good rubber mallet and wind up with one good whack. Done this way it typically only takes one whack of the mallet to spin the action and wrench around.
What some people do wrong is to tighten the wrench to hard onto the action, this can compress the action on the barrel, and that is what makes it extremly difficult to remove.
My wrench has a hole in it so a bolt can be inserted into the reciever to keep the wrench from spinning, and keep the operator from over tightening the wrench.
I have not had to put heat to any action/barrel joint.