So here is where I ended up with my large stick/flake powder version. Working perfectly. I threw about 200 556 powder charges last night. variation in weight at about +/- a tenth of a grain variance. I was testing every 7-10 loads. Sometimes I was at (Ball powder) 27.5 grains, sometimes 27.6. This is using my RCBS 10-10 scale.
I dump the load with the same technique each time. Bring the measure up, give it a two count, bring it down, wait for a two count, and use the knocker twice.
I'm not super picky. If this is the best resolution I can expect with the 55, great, if not, is there any other tricks I should try?