If you're loading that brass for a semi-auto, consider the RCBS 'X' die for resizing. You trim your brass ONCE, and you're done. At least that's what it has been for my 7.62x51 battle rifles. The other important thing is that once you've found that 'good' load, buy all the components in bulk. This lowers your price per round, and will tend to keep lot number variations to a minimum.
"Of all the things I've lost, I miss my mind the most." A. Brilliant