Here are the items that I carry in my shot bag. First my shot bag is 6" wide by 7" deep with a small inside pocket. Attached to the bag strap is a vent pick & brush. The powder measure is attached to the horn.
In the bag I carry a wood tompin, a cloth bag with some tow for wadding and cleaning. Also cleaning wires, foraged bore scraper and tow worm. In the small leather pouch are some extra flints, a very small striker and old musket flint and a few wooden toothpicks to plug the touch hole with. Also seen is a small wooden tube with shot cards a pouch with bird shot and a turkey call. In the small inside pocket is a turn screw and a leather ball pouch with seven 75cal. balls. To finish it off is my priming horn. The cow's knee is carried on the back of the shot bag. (see below photo)
In my belt pouch I have a hand full of tow for wadding and in this case because I was turkey hunting I had paper cartridges made up with the correct amount of shot I was using for hunting. A leather wallet for hunting tags. In the small front pocket there is a small flint wallet with two flints and a forged turn screw. I will set up my belt pouch with what I'm shooting for the day.
Lose ball or paper cartridges blank or live rounds or bird shot which I will remove from my shot bag and place it my belt pouch. It makes it easy for me in the field when loading.
As you can see in this past photo everything is pretty much the same. A few added things and the only thing removed is the copper tin. I found it makes it harder to ad something to the pouch because it doesn't compress. Also I went with a priming horn.