Brass at that time was not the same as todays. The old balloon head 45 brass was known to be a weak link.The old Colts were pretty frail. Mr Keith was very interested in duplex and tripled loads even with smokless powder in his day that was bullseye, unique and 2400.
Him not having loading data is one reason we have a bunch of terrific reloading manuals today. Also we now have single action revolvers built like tanks.
I guess it was you got to break a few eggs to make an omlet theory.
