I did an experiment some years back comparing velocity SD for charges produced by throwing using a Lee Perfect thrower vs those produced by trickling up on a scale. I don't have my notes in front of me, but I tried a few of the propellants I use the most - Varget, H4350, 296, and a couple of others IIRC - and I found that the velocities were at least as consistent for the thrown charges, if not more so. I've thrown all my charges since.
What dan said. I used a Redding #3BR. I could not see significant differences in accuracy, velocity or SD. I will have to look for powders used but H4831SC was for sure on the list, as well as IMR4064.
