I have a redding competition seating die. Also a redding competition necksizing die. Both just recently purchased. Now of course the bushings dont come with the necksizing die. I read that I should take a micrometer and measure some loaded bullets and subtract .001 or .002 to get the right sizing/fit for reloading bullets. I am shooting .308's and reloading them. My dilema is when I measure loaded bullets I come up with just too many numbers to subtract .001 or .002 from. I would have to buy a dumptruck full of bushings to eventually get the right size bushing. MY question is when I am measuring these bullets should I keep in mind that I will need a bushing for the nosler 155 matchbullets.....a bushing for the 110 v-max bullets....and a bushing for the nosler or sierra 168 grain bullets I intend to shoot. Should I measure them seperately? And get different dies for each bullet? I have been reloading using rcbs regular dies and using a rockchucker press. Any help would be appreciated.