I'm trying to fine tune my reloading. I've purchased the Buhay tool and I'm in the process of sorting my bullets into .001" groups. Do I need to sort by weight too, or is it not necessary? If yes, then what weight variance should each group have? FWIW, it's for one of Kirby's 7mm AM's. Is .001" groupings of the bearing surface getting too anal? I went back thru the sub-forum to 2007, and saw that bearing surface was more important than weight, but no numbers or % was given for determining how to group the bullets that were sorted.