I have an Investarms 50 cal flintlock that i've owned for years, and when i hunt with it i run into the same problem every time out. The fit between the lock and pan assembly and the stock leaves a lot to be desired, When i fill the pan with 4F powder, it invariably makes it;s way out of the pan and down the opening and end up in the trigger housing. If i shoot the rifle, all the powder that has managed to find it's way down inside ignites and it ain't pretty. Any suggestions on sealing that gap between the metal and the wood ?