If anybody needs some I have a bagful of these, red plastic "cartridges", pour you pre-measured powder charge in, push in your .58 caliber minie, maxi or patch ball. Plastic holds the ball and makes a water resistant seal against the ball...put some in your "possibles" bag and you are good to go. When you need a load, pull the ball with your teeth or squeeze it out with your fingers, pour in your pre-measured powder and load your ball. Works best for minie or maxi but will work for patched ball of the right diameter.

I have a bagful so if you want to give them a try, 10 cents apiece ship first class envelope on your dime.