I just got a used TC hawkin the tang screws heads were getting messed up. I called TC and they sent me new screws. (I got a wood screw and a longer metal screw from them) The old screws look bigger then the new one. When I took the tang off to clean it, I was surprised that one screw did not go thru the stock and go into the bottom metal like the Winchester 94. Is that how all muzzle loaders are made? Is there much pressure on the tang when fired? I also found that the stock was cracked in front of the screw that starts on the left side, under the tang and connects to the lock on the right side. It is cracked on both sides and goes to the screw hole. Is it still safe to shoot? If not any idea