In relation to the question on the smaller powder dipper in the case.

It is probably a 5/8th dram measure of C&H #6 BP, which was specifically for the round ball load.

The round ball weights about 72 grains depending on alloy and is cast at exactly .375" for the .367" bore size of the .360 2 1/4". A Henry recommended a 12 lead to 1 tin mix with the ball loaded over 1 jute and three bees wax saturated felt wads. It would make a dandy rook type load.
Curl, check the weight the dipper throws and see if this is it. 5/8 dram is a little over 17 grains.
Fraser.