So here's the deal, been shooting my whole life but never reloaded and decided to give it a go starting with my first 6.5cm I just picked up. I don't rifle hunt so this will be for matches and target practice out to 1300 yards. After looking for and reading about what dies to buy im more confused the anything. I think I've settled on full length sizer bushing dies and a micrometer seater if its actually necessary to have the micrometer. My confusion is with neck tension on the fl dies. In order to order the proper bushing to maintain .001 or .002 neck tension do I need to first shoot the new brass to get accurate measurements? If so what size bushing should I use to load up the new brass to fire form it?