I like Ramshot powders
I've been through 3 pounds of True Blue in 9mm, 38, 357, 45, and (believe it or not) .480 Ruger. If it's dirty, it's not as bad as many other powders I've used and, personally, I think it's one of the cleaner powders.
As soon as I can find it, I'm going to give ZIP a try. It's right beside 231 on the burn rate chart and might be a better powder for the lighter weight bullets. Anyone tried it?
I also wonder about Silhouette. Does it burn like the old WAP that seemed to leave some tough gunk on the gun?