I use to load 800X in Federal 20 many years ago. To get around drop issues I put a small vibrator motor on the charge bar housing. It vibrated for one second when the bar returned to pickup the powder. A lot like Spolar vibrated the primer track to stop jams runs for a second. Drops we all the same but I had to use a bushing two sizes smaller. You could check ten drops in a row and thy wold all be within .1 grains max spread. Loads were low pressure and killed quail great.