Homemade Bullet Concentricity Gauge

[Frankk]

I’d like to share a very cheap and successful homemade project. It just takes a $7 chinese 0.01mm gauge, a $10 magnetic gauge holder, 4ea 3/4-inch ball bearings, a short 2x4 bolted on a steel plate, and a small nail.

Here’s a link that shows something similar to what I did.. It was pretty easy.

 

[BoltActionBrotherhood]

I’m trying to figure out an easy way to make a case neck thickness gauge using a concentricity gauge