I tried very hard to get my RCBS Uniflow powder measure to throw consistent charges of stick powder like RL-19 (338wm) H-1000 (7mmSTW) and IMR-4831 (300wsm) and never got it to work, it did throw HG powdrs very well. Went to a PACT electronic dispenser and scale and throw all charges light and trickle using my RCBS 10-10 BB scale. Works as fast and is more accurate than anything else I could afford.
My RCBS Uniflow, Hornady LnL and Lee Classic drum powder dispensers work very well with HP-38, Unique, IMR/SR-4756. Never tried my Lee drum with stick powder as I only intended it for use reloading HG rounds.
If you want to give the Auto Drum a try with stick powder, FortuneCookie45LC got his to work pretty well...https://www.youtube.com/watch?v=GQazETXEOM4