I think you could drive yourself nuts (or develop a huge stock of powders) by fixating on the seating depth first.
Others can tell you for sure, but I would looks at seating depth as fine tuning.
Charge being the coarse adjustment.

If you have your choice of powders I guess you are lucky...

-OMotS


"If memory serves fails me..."
Quote: ( unnamed) "been prtty deep in the cooler todaay "

Television and radio are most effective when people question little and think even less.