One thing that will help keep the scope mounts from coming loose is to make sure to degrease the screws and the holes they screw into. Gunscrubber, which you can buy at Walmart is very good for this. Acetone will do it too. Degrease the inside of the rings and the scope tube also.If you don't have access to LockTite then maybe some clear fingernail polish would do. I've never used it personally, so I don't know for sure it this will work. It might actually be too permanent.

Sorry, can't answer you question about the Fusion bullet. Never used it.