Bill,
I finished a .50 cal. H&A kit from Deercreek last week. It is browned and metal looks good. Stock is utility grade maple and plain Jane! I have trouble getting BP supplies here in Knoxville so I haven't really shot it yet! I had a couple of power belted .50's that I use in my Knight that I fired just to make sure I had the hammer, trigger & spring in correctly. My 3 shots grouped 2" at 50 yds.
I haven't tried round balls yet, I can't find nipples at Wally-world yet - maybe in September. Parker & Son has black powder and caps so I guess I'll make a trip out Ashville Highway!
Actually, I'm killing time, waiting for my .45 cal. 1 in 18 twist barrel to come in from Long Hammock barrel. I'm going to put a Lee Shaver Soule tang sight on it and use paper patched 500 gr. bullets. I'm expecting small groups at long range!