Well that's fascinating, I used the exact same barrel vice to remove a Tikka barrel and those leather pads were worthless. Seems like they decreased the friction rather than increasing it and the barrel would end up spinning. I asked Mechforce about it and they said the pads were more for delicate finishes and applications requiring less torque.
In the end 3 sheets of plain white paper in between the vice clamps worked like a champ. Barrel was held fast and the receiver came off without too much effort.
-Stooxie
I use a couple of business cards and some rosin on my PMA vise. Not sure if it would hold up to removing a factory barrel, but it works for swapping from a BugNut barrel to a new factory barrel and back. I have a new 270 that I bought for the action. I am hoping my smith can get it off without cutting it. I would like to try a mauser outside action wrench with the cap flipped on it, just don't want to buy one for a trial.