Bullseye for 9mm, 357 SIG, and 45 ACP
I've found that I can use Alliant's Bullseye for all of my loads. It is fine grained like Power Pistol and meters well. It also uses smaller charges than Power Pistol when loading to the lower velocity ranges for most cartridges.
For 357 SIG, I use 6.3 to 6.5 gr. giving me 1260 to 1285 fps with 125 gr. Master Match bullets from Wideners. This load gives me 2" groups at 15 meters from my stock Sig P229. If I really want some velocity though, I use Power Pistol at 9.4 gr. which gives me about 1460 fps.
At 9mm, I use 4.6 gr. of Bullseye which gives me about 1190 fps from my CZ-85. I use 124 gr. Master Match bullets and get good accuracy of about 2" at 15 meters. I think the heavier 9mm bullets are a little more accurate than the 115 gr., but that's more of a feeling than a measurement.
For 45, 3.9 gr. of Bullseye gives me about 790 fps from my Kimber. I'm using 230 gr. hard cast lead bullets here and I start getting some leading in the barrel. I could get better velocity with heavier powder charges if I used jacketed bullets. Accuracy here is about 4" at 15 meters compared to less than 2" with 5.4 gr. of Unique.
Currently, since I don't limit myself to one powder, I use Bullseye for 9mm, Power Pistol for 357 SIG, and Unique for 45 ACP when I'm shooting lead.
By the way, all of these loads come from the Alliant Powder Reloader's Guide and are under the maximum loads for each caliber listed. YMMV, use these loads at your own risk. Start lower and work up to see how your pistols work with these loads.