Yes,I love old black powder guns.After much more reserch,i found that Henry Stanley used a Lancaster and Reilly rifle and the really big gun i was thinking about may have been Sam Bakers 21 pound rifle ...that i think shot a 1 pound bullet and was 4 or 2 bore?Info on these old guns is hard to find....I did see yesterday, a new over/under double muzzle loader advertised in a magazine ...that i have never herd of before...it was made by Traditions and looked pretty nifty! .50caliber-350gr.Thompson/center maxie slug would be fun!