Don't seat bullets in charged cases you haven't primed.
This, sized and weighed 50 damn charges of powder for a buds 270 moons ago before I primed the cases, this was with the old RCBS [505?] scale and the twisty trickler.
Had to dump that chit and start over, all his fault, he called me in a panic at night thirty and had just got a spot in someones mule deer camp and was leaving the next afternoon.