Originally Posted by GeoffLinder
Correct, bulky or stick powders use large bar to get deeper rather than shallower cavity. Fine grain ball powders use the small bar.
Polishing inside of bar cavity and the whole bar externally improves the overall experience too
I wouldn't do that. The Dillon powder bar has a tefflon coating on it. All you're doing is removing the tefflon coating thus adding more friction and play when the bar moves during operation.