Just a thought, as I'm fairly new to reloading (loaded and fired, maybe 500 rounds total now, with mixed results). When seating bullets, I've noticed many seat at a slightly different COAL than one another. In the past I have adjusted the die for each and every cartrige, to make the COAL as close for each round as possible. but I began to think, this would, in actuality, make the distance from bullet to lands vary moreso than if I let the COAL vary from round to round, because the part of the seating die that touches the bullet is close in diameter to the diameter of the barrel/lands, and thus, the LENGTH of the round varies from bullet to bullet becaus of discrepencies in the ogives of each bullet; therefore letting the COAL vary slightly may do MORE to achieve a uniform DISTANCE FROM LANDS. AM I RIGHT?