How do you remove a subborn baffle, .25 R3M

Good day to everyone,

I have an issue with my .25 R3M with respect to removing the end barrel baffle. I decided to clean the barrel last night and in the process I was unable to remove the baffle from end of barrel, instead, it unscrewed from the breech block end. Now I have no leverage to restrain the barrel to remove the baffle section. Not a big deal as I was still able to clean barrel but does present a less convenient way of cleaning it with the baffle attached, at least with the pull through method. I would like to remove the baffle and perhaps add anti-seize compound to prevent this in the future.

I would like to take care of this now as opposed to the next time thus giving even more time to self weld itself, for lack of a better term. I’m sure others have dealt with this same issue and just wonder what others have done.
I have read on this forum a gentleman using vice grips on the barrel, though successful, left marks on the barrel to the point he had concerns of perhaps possibly damaging the barrel. This too would be concerning to me and is why I am asking what you have done to resolve this issue. Perhaps one could double nut the breech end of barrel, providing there is enough threads, would have to be a fairly thin nut. Does someone know the barrel thread size. If one were to use leather and vice grips would one be taking a chance on altering the internal specs of the barrel?

Thanks, looking forward to your comments.

Mike