Re: Blackpowder rifle bluing
Definitely go with browning, not bluing. You'll have a more authentic, interesting rifle.
I purchased a CVA Mountain Rifle, Hawken-pattern, about 1980. I was particularly attracted to it, over the more common Thompson, because it was browned and not blued. It just looked older, more authentic.
I've never regretted that decision. Go with browning.
"Therein do I see an ugly cat. Smoke. Fire. Brimstone. A vast desert. Holes in parchment. The ugly cat is much amused." --- The quantrains of Gatodamus (1503-1566)