Honestly, I've had good luck polishing the funnel, and adding a small vibrator. I put a timer on each powder throw and it is +- .1gr max.
This is the only measure for Progressive loading I know of, so far, that has gotten rave reviews using stick powders.
https://www.quick-measure.com/progressive-mount-assembly.html
There is a learning curve.
Ball powders will be less of a problem for consistent charges. As for accuracy, YMMV.
I have a Lee powder measure and it’s not consistent either
It’s bad enough that I don’t even use it any more
Even a manual thrower will have difficulty with stick powders. You may have to revert back to throw charges below what you want and trickle up..........or find a more suitable (ball) powder.




























