Rob - you have to depress the metal clip (there may be a more technical term) on the right (bolt handle) side of the rifle before the barrel band can move forward. Sometimes you may have to use a tool to push it hard enough (a punch or dull screwdriver). If the band is loose-fitting enough it should slide forward. On mine I have to wiggle the top and bottom of the band forward and back and kind of "walk" it off. I've heard others have to use a wooden dowel and hammer to tap it off.
Good luck.
Will
Good luck.
Will