Does it not eject, or not cycle properly? Will it strip another round and stove pipe or just fire and leave the spent shell in the chamber without picking up another one? If it is an ejector problem or the the spent shell is grabbing than it should fully cycle and try to feed another round I would think. If it does not cycle fully then there is something wrong with the recoil system. I don't know that gun well enough to even comment on what it could be if that were the case.

I would try swapping barrels like suggested and if that doesn't work find a good gunsmith and have it looked over.

Good luck,
Paul