If you add cost to the decision vs. presure vs. velocity, I think it would be Blue Dot or Power Pistol. With the AA#9 you use so much more powder to get results with AA#7 doing a little more work with a little less for some bullet weights.
Blue Dot has worked very well across a broad spectrum of cartridges and bullet weights and shotgun shells. It remains my mainstay.
Recent purchases of LongShot and IMR 800X have tipped the scales at $30 + per pound.
800X has been a good performer actually better than LongShot with heavier bullets and LongShot performs better than 800X with the lighter bullets from what I can tell.
I like LongShot in the 9x25Dillon cartridges but will start workups with 800X to compare.
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