Bill, what make gun is it? Knowing if the bottom rib is soft soldered or brazed on might offer a solution. Does the stock have a butt plate or a pad? Depending on the wood a 1" diameter hole an inch deep will be about an ounce. Weight inletted into the fore end would be easier, but would require a greater weight as it is closer to the center of the gun. Sounds like a nice toy, hope you can find a solution. Mark Robson