Does any body use them in your reloading?

Are You referring to the oal cases/

I'm speaking primarily of the cases that have the base drilled and tapped to use for checking OAL to the shoulder or comparing headspace from one chamber or another.

I messed around with them for a while. I found that I liked to fire form and make my own cases.
Its a touch feeley type adjustment and easy to have false readings. the one that got me was a build up of carbon.
A little dirt in the chamber changes the game as well.

That is what I found. I use more positive ways now. I sent them a couple of fireformed cases with turned necks. They work, but I use other methods now.

what have found that works for you,
I just go by a book number and adjust in or out by test firing. I didn't get any real good results by loading and adjusting to the lands.
Dave

Dave, I quit using them quite some time ago. I dfo other things. I have what few cases advertized in the classifieds.