Checkout this post on one man's experiments with the 44-40 cartridge.

[MikeArthur]

"My 44-40 Black Powder Journey"
by John Kort

http://www.cascity.com/forumhall/index.php?PHPSESSID=h548h62k2rburk6bgpi66o3iu5&topic=54292.0

Mike Arthur:cool:
Hampton Horse Artillery
Potomac Region, N-SSA
Charleston, SC

[Lou Lou Lou]

it was also posted on Cast Boolits.com