I Found these neat nylon test tubes that happen to have  the perfect inside diameter for a patched .45 or .50 Caliber round ball, sabot or pellet charge. They have a locking air tight lid that wont get brittle and break off like all the speed loaders offered by branded gun manufacturers. Use them to carry premeasured powder or pellets or extra balls or sabots. To make them into a speed loader, all you do is cut off the bottom for the patched ball to pass through. Comes as a  pack of Five.