Eric,
I use a Dillon 550B and love it. Two things which seem to affect accuracy in the powder measure are 1) increased volumes and 2) longer tubular powders. These two seem to cause more variation. I'm not talking catastrophic variation here just slightly more. At least three powder bars are available. Using a larger one seems to help, since it is not close to its capacity.
I'm told that some measures like a "follower" which amounts to a small flat weight resting on the powder to keep consistent pressure at all times. In the Dillon, there is one available that also has a low powder sensor. Sooner or later I will buy this device or make one of my own.
I have had no trouble with the Dillon measure except when I started loading for my .300 Win Mag, using RL25. I have no been getting consistent enough loads for my likeing, so I measure each one in the scale. But that's what I like about the 550B. Though a progressive, it can be used to load single cartridges at a time. One can take them out, inspect, repowder, do whatever, fuss around for a long time just on one cartridge all to your hearts desire. Or if needed, you can crank out dozens of good quality rounds in a few minutes. I tend to do that with pistol rounds that I use for recreational shooting of swinging steel targets and the like. With my hunting rounds, I tend to weigh more often, and lately every round.
Straight wall cases tend to fill with less variation I think, though I've never ran tests to really varify that.
Though I've never used any of the powders you mentioned I'm very satisfied with the Dillon. I use Red Dot, Green Dot, Blue Dot, RL7, RL15, RL19, RL25.