Apparently this is one of the tight barrel to receiver rifles!  Have the barrel clamped, receiver block installed and carded to protect the finish) and have a wrench w/ a 4' cheater bar on it. All it wants to do is turn the barrel in the bushing. Full disclosure inn case I am being a moron I did not disassemble the magazine parts from the rifle as it did not look like it would make a difference. Put Kroil on the barrel to receiver seam and letting it set.

Mark