Unique will give the best velocities, AA#2 will meter the best. Unique will not work with an adjustable charge bar for the small charges needed with .380. It will work fine with a Lee autodisc.
I also like 4gr of Unique for 95-102gr jacketed or plated bullets. Of course you need to work up.
Appreciate the info. I use a Lee ProAutoDisk and I have the charge bar available, too. I'll have to experiment a bit and see what works for me.
Thanks EVERYBODY for the info and suggestions. I've gotten a lot of great recommendations and now have (an even longer) list to sort through. It does help to hear what works for you all and your judgements about which powder characteristics are important for your load choices.