Hi
This is a month or so old, but I read both of Mike Venturino's books, Lever Guns of the Old West and Shooting Sixguns of the Old West. In his books, Mike works up loads for the guns as well as using Factory stuff. In both Lever guns and in SAA'a (most others also), the 44/40 was the most accurate. The .45 LC was one of the least accurate. I don't remember what the reason was, or if it was even given.
Later