Lead
I had to remove a 1917 Enfield (Remington) for headspace problem. Tried wood and rosin, barrel slipped, even tried a little heat. Then I casted a lead bushing using copper pipe & wood for a form. I used 1 1/4" copper pipe split in two halves (fits hole size in barrel vice), drilled a hole in piece of plywood a diameter where I wanted the bushing to stop on barrel, I used two pieces 1/4" thick wood (contour to the barrel profile as spacers between copper pipe halves. I orientated the barrel vertically with muzzle up, slid plywood down barrel ( stopped about 1 1/2" from receiver), placed copper and wood spacers between copper halves, around barrel and wired them together. Melted some lead and poured the lead between barrel and copper pipe for my bushing, (clean the inside of cooper halves and put a little flux, the lead will stick to it like solder. This bushing gripped the barrel tight. after four good wackes with a 2 1/2 lb sledge, barrel UN-threaded. I've used this method on numerous barrels, the heat from the lead does not affect the bluing. This takes less time to do than explain it here, and a lot easier than making aluminum ones on a lathe, it fits the barrel perfectly.