I got a $50 gift cert to Cabela's. I might buy some Sierra Gamekings, but I'm tinkering with the idea of turning necks for certain rifle loads (something I don't do now). Knowing I don't have match chambers or anything, how much do you think it will make a difference? How about Hornady's concentricity tool? Utilitarian gizmo or what? The neck turner they have is RCBS (buy the pilot separately). I get to shoot rifle out to about 500 yards a few times a year, but 200 any old time. I'm happy with the loads I have, but better consistency always appeals to me. Thoughts?