Mike all the bullets you intend to seat for length consistency before seating. Depending on the bullet manufacture, I found up to ten thous. difference from base of bullet to ogive. That will not help your test. I normally move 5 thous. Develope all my loads this way. If you can, get bullets of the same lot. And, bullets of same manufacture but different box, can be very different. I assume coming off seperate production lines. Check them before you seat them.
