Something I read is that bullet seating depth is kinda like setting the timing on a engine, different bullet seat depths allows you adjust when the bullet leaves the barrel at certain harmonic fluctuations in the steel of the barrel, So basically setting your bullet .020 from the lands will not neccisarily give you the best accuracy and a bullet set even a 1/16 of an inch from the lands could possibly give you the best accuracy. I am gonna play with the SAAMI specs of bullet seating staying within the printed minimum and maximum and see what I come up with.