CaptainKirk,
You start out asking about "nomadic hunter and trapper back in the day" and end up talking about "wagon trains heading west to places like Oregon and the Pacific Northwest, California, and the American Southwest where there would not likely have been any rendezvous activity and probably few, if any, settlements once they reached their destination." Those cover two different periods. The mountain men period was pretty much pre-1840 and Oregon Trail and California Trail post-1840.
Kansas Jake's responses to both, though general in nature, are correct.
The earliest documented use of a percussion arm by a mountain man is Lucien Fontenelle who purchased 500 caps with his J&S Hawken rifle in 1832. At the time, Lucien Fontenelle was a brigade leader for the American Fur Co. who led supply caravans to the mountains as well as trapping parties during the trapping seasons.
The idea of lone free trappers scouring the mountains and streams for beaver is largely a Hollywood perpetuated myth. Most trappers were part of a brigade that was outfitted with pack animals, camp tenders, hunters, and blacksmith/gunsmith. The trappers might split off from the main brigade for short periods to trap the various streams in a drainage, but would re-join the brigade when it was time to move to another drainage. The brigades would usually come together when the streams froze over to spend the winter at one location. Then move out for the spring hunt and meet up again for the summer rendezvous.
The brigades brought everything that would be needed for a full year in the mountains. They had the pack animals to haul everything and the numbers to keep everything safe. There would be no problem with bringing an adequate supply of caps for those few men, whether brigade leaders, hunters, or trappers that wanted to carry a percussion rifle.
The 1836 rendezvous supplies included the following:
2000 | Gun Flints | | |
500 | Rifle Flints | | |
2 dz | Gun locks | | |
6 | Rifle locks | | |
4 pairs | Pistols Iron | | |
2 | Am Rifle | | |
7 | Am Rifle | | |
8 | Hawkin Rifle | | |
84 | N. W. Guns | | |
30 | N. W. Guns | | |
2 | Rifles Hawkin | | |
10 | Boxes Percussion Caps | | |
1/2 dz | Gun & Rifle locks | | |
2 | Rifles Hawkens | | |
I'm not certain how many caps were in a "box", but these are wholesale or bulk lists so I assume a 1,000 caps per box or 10,000 caps total. This compares to 500 Rifle flints. The 2,000 Gun flints would be larger flints for NW trade guns. Note that the list includes spare rifle and gun locks so the blacksmith/gunsmith could make repairs to the rifles and trade guns in the mountains.
A supply of 10,000 caps suggest a significant number of percussion rifles and pistols were being carried by members of the brigade.
By 1840, percussion arms were very common. The folks headed for Oregon or California by wagon train would have no problem carrying an adequate supply of percussion caps if they chose to. Once in Oregon or California, they could be resupplied by the annual wagon trains, but more likely by the many ships that operated up and down the coast for the fur trade and the local economy. As the population grew in the 1840's and 1850's, the port towns/cities in Oregon and California would have had all the merchandise that places like New Orleans, Galveston, and St. Louis had, mostly supplied by ships.
The descendents of the mountain man James Clyman still have his full stock J&S Hawken. It is a percussion rifle. Clyman was a trapper with Ashley's men in the mountains from 1823 to 1827. The rifle(s) he carried in that period would have been flintlocks. He decided to travel the Oregon trail in 1844. He then traveled from Oregon to California the next year. He returned to St. Louis from California in 1846. His surviving percussion Hawken rifle was likely carried on these travels in the mid-1840's. Clyman traveled with wagons and pack animals. The point is that he didn't seem to have any trouble carrying or getting re-supplied with percussion caps for the more than two years he spent away from St. Louis in the West.