Once again, I believe the .44-40 and the .45 Colt had different standard overall lengths.
It's not just the case length that matters. You have to take into account how much the bullet adds to the overall length.
I have in my personal collection period .45 Long and .44-40 rounds (probably loaded 1890s to just before World War I). I'll have to drag out the micrometer and see what it has to say.
"The gift which I am sending you is called a dog, and is in fact the most precious and valuable possession of mankind" -Theodorus Gaza
Baby Jesus cries when the fat redneck doesn't have military-grade firepower.