When I was a might of a lad I was fortunate enough to be at a location and time when the very dregs "smoke-pole" use was still in the hands of those who were either too poor to purchase a "modern" rifle or just too obstinate. Lucky for this writer as I registered what I saw. Now, turning my mind's eye reversible, as Norman Corwin said, I recall the simplicity with which these folks used their muzzle-loaders; pour a pile of powder in the palm and dump it down the barrel, same with the shot. Years of experience was manifest in their application of loading "smoke and noise" guns.
Now to get where I was headed. I traipsed the woods and fields with three of these ole-timers and each carried two small horns: one for shot, the other for powder. The horns were small; usually between 3 and 4 inches. They were called "day-horns" and fit nicely in pouch or pocket. Today, it seems, we make horns to carry enough powder to last us for a good battle. I know I do. But would it not be most reasonable for the farmer of yore to carry the smaller version? Rather hump the bigger carcass than a bigger horn.
Himmelsnoot Flickblatter, a hoary old horner.