I have the exact same problem with a springer 1000, but I don't remember if it is the gamo or a daisy. Anyway, loctite the screw with either loctite blue or red and give it a tighten. It has been working well for me now. I've taken a rabbit in my yard at 100yds with it. Loctite the scope mount screws too, the scope mount takes a beating on springers.