Smoke can't always be blamed on the powder.
Lube, crimp, and load have allot to do with it also.

I never got allot of smoke and soot with Unique in my 45 Colt loads but, I get substantially less since I've started using White Label's Carnuba Red and Ranch Dog Outdoors' collet style Lee Factory Crimp Die. Even in my "light" 8 grain Unique over 255 grain RNFP loads.

I have a bunch of bullets that I pan lubed with a mix of Orange Magic and Bag Balm that I made up. Using the same load of Unique, bullets, and crimp even those smoke and soot more than with the exact same loads using Carnuba Red.

If Unique bothers you that much do what others do. Switch out Unique for Universal grain for grain. Universal does meter better than Unique but for me at least I don't see too much difference soot and smoke wise with the new crimp die and lube.

I still prefer Unique "Flaming Dirt" especially for lighter loads, I get some unburned powder with light loads of Universal. Unique is a few bucks cheaper per pound too.