Re: seating bullet
what kind of dies do you have? with rcbs, trial and error is the quickest and easiest for me. seat it long, then measure. screw the die in a little more, seat it further, then remeasure. once you get it at the right distance, tighten up the lock nut on the washer and you're there. i also make a dummy round for quick reference in case something happens in the future.
If it were easy, I wouldn't be doing it.