BALONEY- cure the problem at once or pull the offending round from sequence, fix the problem, and resume- if it's a major problem,like something broke, drain the powder , and empty the primer feed-and for gods sake STOP
it's easy enough to LOOK onto the case to see if there's a charge or not- or use a charge stick-by LOOkING into a case it becomes OBVIOUS what a double charge looks like- or use a powder that won't double charge- ie 231 in a 45 acp case- full up,it won't take but 7 grains- ie 10 grains won't fit - it will spill over- a lot of guys rig a flashlight to see into the case and improve the primer feed with o- rings on the second support so the primer feed gets a better "bump" when the primers feed- I've been doing this since 71, got my first progressive about 86 or so, got the Dillon in 92, so maybe I know a thing or 2