Sharpie 443
Make sure you keep the plugs to the front end of the stock, do not get behind the bolt in the stock when you drill and insert the back plug, if it is to long it will not let the washer rest aginst the coller in the the stock and therefore the bolt will not tighten the stock up with the metal, I know this first hand, I drilled it 3/8" to far back and got into the bolt head hole of the stock.