Clean .45 acp powder suggestion

[ChefJ]

Ive been using 6.5 grains of Unique on top of Ranier 200gr flats. They shoot great, I figure it's a reasonable approximation of a factory load but it is a tad dirtier than I'd like, any suggestions as a powder to try next? I should mention too that I load on a LNL AP so the finer powders tend to meter better.