In truth I'm JUST CHEAP!! I load cartridges with Swiss and they just don't give the stuff away. I have switched over to Goex for the 45 Colt Gallery Loads though and I don't see any difference as far as cleaner.
The one thing that none of us has mentioned is NOT re-sizing 45 Colt brass after it's fired with Black Powder. So far I've got some brass that has been loaded a dozen or more times with no re-sizing and it fits roughly the same as some of my newer stuff.
I found that not re-sizing cut down on the "Blow Back" in the cylinder considerably thus reducing cylinder related fouling.