Wow... Eric knocked it out of the park with this one! Just as he did the last one, and the one before...
There is historical precedent. Below is a piece that was displayed and sold by Ambrose Antiques several years ago. Fortunately, I had sufficient presence of mind to save some pictures. Here is a lock-side view:
And the reverse:
Detail of the lock, which was converted from flint:
...and a detail view of the tack work, in a design very similar to that used on Eric's gun:
Ambrose described this one as having a 12-3/4" octagon to round barrel in 24 gauge, likely recycled from a trade gun. However, they stated the lock was from a Long Land Pattern Brown Bess, and the triggerguard is "sheet steel." So, the original was also a "parts gun," as Eric described. Ambrose indicated there was no sideplate, and there is obviously no buttplate. I don't see any provision for a ramrod, but with a barrel that short, you could easily carry a loading rod stuck in your belt. They stated the "percussion bolster" was of brass, oxidized to a dark color. They did not provide any information with regard to the gun's provenance.
Eric described his gun as being "somewhat self-priming" with FFg powder. This was actually an advantage in some circumstances, buffalo running being one of them. Here is a short excerpt from John Palliser's
Solitary Rambles and Adventures:
This preference for a self-priming flintlock for that type of hunting was also mentioned by others, so it was not unique to Palliser.
I believe there were several practical reasons flintlock trade guns "held on" for so long in the far north. Not only could the spark be used to ignite a fire for warming up (this, too, has been described in the literature), but priming a flintlock might be easier than handling percussion caps in extreme cold weather. In addition, if the gun was "self-priming," it would save a step in the loading procedure. That's just a hypothesis on my part. I'm a southern boy, and have no practical experience hunting in that kind of cold.
In any event, I would like to thank Eric for showing his "Buffalo Runner." Well done!
Notchy Bob