Are you certain that you are not rubing on a screw? Take it out of the stock and try working the bolt without the bottom metal attached.
I have seen screws from sights and scope mounts bind bolts. Also you might be binding the action with one of the action screws. That is why I'd asked you if you have tried it sans magazine assembly. Out of the stock.
It would seem like a major case of dumbass to load 100 rounds for a rifle whose operation you question, and that you do not know how to modify... if necessary. I have barreld up a half dozen 96 actions. If it were in my hands I could probably tell you your problem very quickly.
