I have a ruger charger in .22lr. I want to put a bull barrel in the stock, that is holding a standard thin barrel. How should I go about this ? I was thinking about a drum sanding mandrel with sandpaper on it . Then I would grind/shave sand it down like that ? My original stock is that plastic/nylon stock. Dont know if this is going to work ? Any ideas would be appreciated , besides going out and buying another stock LOL.