Originally Posted by Outlaw6.0
I'm guessing you have the Hornady (or similar) Bullet run out guage?
No sir. I forget who made the ones I have, but they are actually runout "correcters".
Picture an aluminum block. A loaded round goes in the top (these blocks are caliber specific and fit very snug) and is spun with your fingers. A dial indicator goes in from the left side and rides on the bullet tip. There is a threaded "screw" on the other side (with a pivot point where it touches the bullet) with a large knob.
You spin the shell by the case head & find the high and low spots. Put it on the high spot, screw in the "correcter" and actually straighten out the runout.
Pretty slick little tool, but there is no way to move where the dial indicator rides (I can't adjust it to ride & check the case neck).