Oddly enough, handgun cartridges never seem to have been identified by the powder weight like many rifle cartridges were.
In fact, I can't think of a single one...
And no, I'm not counting the .32-20, .44-40 or the .38-40, given that they originally were Winchester rifle cartridges.
"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.