Thanks Mike, for the post and video. While you're at it, thanks for the YouTube on the Bucks County TOW kit.
Anyway, inasmuch as I always shoot from the pouch and am a Cordwainer, when I built my new smoothbore this past month I built its bag for function. I can't point to any document that shows this kind of bag, but the presence of the rivets, nails and wood suggests a Navy influence. The bag is made of stiff and well worn cowhide that served several years on my Cowboy Action Gun Cart. I did not have to worry about antiquing it because it got all the sun and wear I need to get a character based look to it. I simply glued and nailed two wooden side panels to the leather on each end, and a third wooden panel to divide the interior into two uneven compartments.
Looking down the throat of the bag, you can just about see the small compartment on the left. That's where the truncated horn goes that holds my wads. I can lift it out and put it back with relative speed.
I dunno why, but my gun likes an over powder wad and patched ball. Paper shoots in different zip codes with each shot, so I use cloth, but the loading block rounds work in tighter groups. So I built two side pouches with center butt seams to hold the loading blocks and fastened them to the wooden sides. The cartridge block holds my paper cartridges in the bag, because carrying and working a powder horn on the trail is a little time consuming and cumbersome. The tools, flints, extra loads and other stuff fit in the bag under the cartridge block. The block was cut to hold eight rounds because this bad boy likes to be swabbed around 8 shots. 18-20 usually make up a trail walk.
After pouring powder, the wad and round go down in one shot with the ramrod.
The only amenity from the twentieth century I have kept for forty years and am willing to get in a fist fight with critics over is the fake ivory priming horn that I scrimshawed. I keep that, the brush and pick, and the patch knife in the strap itself. Although you can't see it, the shoulder straps coming out of the back of the bag are held with a button and loop over the D rings in the strap. That way, when I change guns, I can take a different bag every time and use the same strap. I can put a leather circlet in place of the D rings if I want, but so far I don't want.
I've found over the years of trekking that the cartouche bag of stiff leather seems to work better with a smoothbore, but would add that my model is based more on the Rangers than the long hunters.
Don't shoot yore eye out, kid
The Capgun KId