I wasn't going to post this, as it is a pretty cheap way to do it, but it does work. You can use flat toothpicks (Yes, still available), and a little Krazy Glue, to do this repair. You take the toothpick, apply a little glue to the big end, and slide them in and around the outside of the wallowed out hole. Hold them until the glue sets, then snap them off even, and then either use a knife, or sand them even to the stock. The screw now has extra wood to thread into.