Might be a late post, but coincidentally, I just built an almost identical Colt "belly gun" with a Howell's 45 colt conversion, and 1860 barrel, and 1851 London grips. It makes a very handsome little pistol, but I have a question if anyone is still tuned to this post. I noticed that the barrel is not cut vertically perpendicular to the barrel on any of these that I have seen, including Long Johns Wolf. Does anyone know why this is done? I just shot mine for the first time today, and once I figured out how it shot, it completely ripped out a 3" hole in the target at 10 yards...a little high and to the right, but completely adequate for a pocket pistol.