I did a pretty thorough review of velocity with the 45 Colt using FFg, FFFg, and Hodgdon's RS, P, Ctg, and Select. Real black powder by Goex always had a slower velocity. The fastest was the Ctg which is an Fg equvalent.
I recently compared FFg, FFFg, Triple Seven, and Clearshot in the 44-40. I did not get to chronograph, but Clearshot gave the most accuracy from my Marlin 20" Cowboy rifle, and Triple Seven had twice the recoil of any of the others....all with the same volume loads.