In Madison Grant's book "The Kentucky Rifle Hunting Pouch" there is a picture of an original bag, undated, that has a 20 round loading block attached to it. Grant believed that the pouch and block belonged to a "stump shooter", which I believe to be a type of target shooter. My experience with them is that they work well for a second shot, but beyond that, the fouling in the barrel becomes a problem with any kind of thick lube(bore butter, moose snot, etc)on the patched ball in the loading block. I know the old timers are said to have used the smaller ball, thumb started, probably a coned muzzle and all of that, but I cannot see the loading block as being much use in a combat situation. I think they would have probably bare-balled it if speed of fire was a concern. I like to make paper cartridges, with a thin patch sewn to the ball inside the cartridge. I bite off the ball, which gets it wet with saliva. The pre-measure charge loads quickly, as does the spit-patched ball, with no short starter needed. The spit patch does a better job of softening the fouling than any grease lube I have ever used.