as I want to hunt with what they used back in the fur trade using either a trade musket in 20 guage as I am looking at some I like as I want to experience hunting with the weapons our ancestors used and also was there 32 caliber or 36 caliber rifles used back then as well? thanks guys!
Well you probably are talking about the Rocky Mountain fur trade?
Seems that down in America, rifles were favored but not exclusive. So a .50 or .54 caliber caplock, "plains" style rifle will give you an idea of what it was like. Shoot patched round ball if you want the whole picture. I don't think there are records of "Hawken" rifles being made in flintlock, but there were "trade rifles" made by guys like Derringer (same guy as the tiny pistols) who made them in flintlock.
The Lyman "trade rifle" will do you very well. Folks will sometimes say the 1:48 twist rate is some sort of "compromise", which is a myth, since it's the most commonly found twist rate in original rifles, long before "conical" bullets were available.
https://www.muzzle-loaders.com/lymantm-trade-rifle-percussion.html or for a few dollars more there is this from Lyman
https://www.muzzle-loaders.com/lymantm-great-plains-rifle-percussion.html which has the slower twist for much heavier loads with a patched, round ball.
Now up along the Northern US border, and in Canada, the 20 gauge trade-gun was much more popular than the "plains" rifle...aka the "Hawken". Not a great copy of such a gun, BUT a good shooting gun that has all the requirements of the original is the Pedersoli "Indian Trade Musket"
https://www.dixiegunworks.com/index...8/product_name/FK3370+INDIAN+TRADE+MUSKET+KIT The link is to the "kit" which you simply sand, stain, and seal, because DGW is out of stock on the finished piece. So while you'll be limited to around 50 yards with this shotgun, you will however be able to use shot for small game like rabbit and squirrels.
LD