The "straw method".....
I looked over this post below and tried this modified straw method. Results were a little better, but not to the pass/fail ratio I was looking for.
http://forum.accurateshooter.com/index.php?topic=3779862.0I took a step back and thought it over... How can one break up the clumps so that the device can work properly?
So I put my little spin on the idea of the straw...


I run the straw in all the way to the rear of the machine, and I cut little teeth in the end, so that the direction of the tubes spin breaks up any clumping or bridging that may occur.The slick insides of the straw allow the powder to slip down the tube and not get caught up in a traffic jam and clump together.


With this setup, the throwing of the charge takes a little bit longer, but the pass fail rate has dropped to about 1 out of twenty overthrows. Most times, like 90%, the over throw may be .1 grains over, easily scooped out to bring the charge to the correct weight.
This is with Varget powder. The other powder I use IMR 8208 XBR has an even better pass/fail ratio.
This mod has sped up my loading process by an order of magnitude, and the ES and SD comes into line quite nicely for a Chargemaster thrown load.