Probably sticking my head in the lions mouth....
I feel compelled to comment on the 16 bore smooth rifle.
I own a 16 bore rifle, it weighs 10 pounds. To get USEFUL trajectories to 100 yards or so we need 110- 120 gr of powder. This is with modern powder, the poorer powder often found on the frontier would have required a greater weight of powder. 110 is 25% of ball weight. 140 is only about 33% of ball weight.
It takes 140 to get 1600 fps from my 30" barreled rifle. 1600 is the break point for looping vs fairly flat trajectories. If only shot at 50 yards less powder can be used. For shooting people this can be extended since a sanding man is very deep vertically so from the stand point of trajectory shooting men can tolerate a lower velocity.
Recoil is a serious factor, with the English buttstock design my rifle does not inflict any pain, but its hard on a persons neck as the video shows. In stop motion its even more impressive.
If shot from the arm, as a curved buttplate requires its going to "leave a mark" even with a relatively light charge.
I would like to see some experimental "archaeologist" type copy this gun as exactly as possible then shoot it.
With the buttstock design, the "buttplate" design etc. I suspect it will not be a lot of fun, its eminently impractical in this bore size as stocked.
I hate to dispute the history but observation tells me its stocked like a 1820-40 Squirrel Rifle.
Anyone who thinks this is seriously in error needs to make a copy and shoot it.
The barrel could easily have been used at Kings Mtn. The stock? It seems out of place.
But I was not at Kings Mtn.
Dan