Rex - I'm very late to the show here, but here goes: I have used an RCBS Little Dandy powder measure for years
Another vote for the Little Dandy and ball powders.
My first instinct in this thread was to tout the Little Dandy. I didn't because OP sounds like a newer reloader and the rotors can really add up $$$, aside from the wait if you need a size bigger or smaller to try.
That said, I'm lucky enough to have all but 3 or 4 of the rotors and I absolutely love it. As you, I use ball powders that meter well and I never, ever have a variance from charge to charge worth worrying about.
Cases go in the loading block, I hold the measure in hand and drop charge after charge, mentally counting as I go. Drop a row left to right, the next row right to left and so forth. My count hits X, which is the number of cases in the block and every case has powder so I know I didn't double charge anything. 50 cases take about 90 seconds, so minimal chances for distractions.
We all have our pet methods, that one is mine and well worth the investment, I think.