I just purchased a Marathon Rifle, single shot .22, and there is an extractor problem. It will not eject the spent shell. At the same time any help on how to seperate the barrel from receiver would be great as I am wanting to reblue and refinish the stock at the same time. The barrel appears to be attached with one screw in the lower, but will not seperate. Could it just be that I need to use a dowel to tap it free, as this would be a last resort. There is also some work needed to be done at the front of the chamber. I am out of luck in searching the net, cannot find anything, so hopefully someone here will be able to help. Thanks.