Buffalo Arms is your friend for black powder:
http://www.buffaloarms.com/Content.aspx?PAGE=Black%20Powder

Will ship even single lb if you want........

I have found over the years that for the British BP Express Cartridges both Goex or Elephant work best duplexed and compressed about 1/10".......personally use 5-10% SR4759. Gets velocities where they ought to be and burns cleaner.
Swiss much cleaner, less hard fouling, and better velocities for equal measure when using straight black.
- Mike

Back to the thread:
I had a Pedersoli 1874 Hartford some years ago in .45 2 7/8", barrel was accurate however it just was not as appealing as a Shiloh or C. Sharps. Mostly due to finish on the wood, slightly different "feel" and visual styling of forend, and odd treatment of the pewter forend tip. Action and barrel were quite nice tho......
- Mike