My armory duplication load (Frankfort Arsenal November 1873 load was 30 gr powder, 250 gr bullet, in a balloon-head case):
Winchester Large Pistol primer
Starline 45 Colt case
30 gr Goex FFFg
Ideal 454190 cast 20:1, lubed with SPG or one of my experimental lubes
OAL 1.6"
Velocity was ~875 fps from a 7 1/2" barrel. No crimp groove in the original-design bullets, so roll-crimp just barely over the ogive. . . although taper-crimping these worked just as well, and gave more consistent velocities.
I had a hollow-base version of the same mould but didn't see any difference in group sizes.