If you’re going to toss the barrel, you can make it easier to remove by the following:
With a hacksaw, cut a groove all the way around the barrel within maybe a 1/32nd to a 1/16th inch of where the barrel butts up against the receiver. Obviously, you don’t cut into the receiver at all.
Make the groove about as deep or just a little deeper than the contact area between the barrel and the receiver (maybe 3/16th inch, I forget!).
This groove will relieve some of the side pressure. However, some Turkish Mausers have a recessed barrel seat in the receiver – this may not be so helpful if you’ve got one of those.
If you don’t use a barrel wrench as mentioned by Yankee1911, you stand a chance of warping the receiver!
See also: [url]www.brownells.com/mausers.htm[/url] for a great article on rebarrelling Turkish Mausers.