WD45: I believe 'Sixguns' was written by Elmer Keith but I forget who wrote "Hell, I Was There" - that may have been by Keith, too. I have read exerps from each and they are exciting, especially since the author was the one who actually witnessed what he was writing about.
As I recall from my readings, Keith experimented with heavy loads in the 44 Spl and 45 Colt. He also handloaded most of the cartridges he shot, including the 32-20, 38-40, 44-40. Interestingly enough, he only complained about the 38-40 just once, and that was with factory loads - his own handloads were enough to kill enraged bulls with a shot through the skull - pretty darn good for a cartridge most people today think is either underpowered or obsolete.
Keith had 'blown up' a number of Colt Single Actions by overloading his cases to get better velocities and stopping power. Keith was a big bore fan, make no mistake about that, and an advocate of bullets that cut square holes - hence the semi-wadcutter designs he remains famousn for to this day.
A man can read a lot of books in his time but he can read a few worthy of note and filled with the kind of information that will last him through lifetimes of hunting and shooting. Keith's books are some of those - you may want to see if you can find a copy. He may not have been the best of authors or the easiest to read but once you have read his books you will feel as though you were right there when it happened. HTH. Mikey.