Guys my 30br is finished but i didnt have the smith put a pad on it yet as i wanted to see the balance of the rifle. It will need some weight in the butt stock before i put the plate on it. The inside of this stock is kinda foamy. I am not exactly sure what the material is. Anyway whats the best way to add the weight? And how do i secure it? Just looking for some info so i do this correctly. Thanks Lee