Feltwad,
What was the approximate capacity of the flask?
Curious, what powder charge did they use in the 4 bore and the 2 bore guns? Years back, I set up at a gun show just down the row from a fellow who was showing a 2 bore rifle, among other things. He was saying the service charge on that was about 500 grains of Fg. Oofda !!!!!
John (Bigsmoke)