DIY chamber length gauge

So I found this on the interweb the other day and gave it a crack.

How to Craft Your Own Chamber Length Gauge « Daily Bulletin

Mine turned out like this

Attachment 111873

Works good and after averaging 5 measures i have a good idea on how long I can let my brass grow and how much to trim it.

I made a few sacrifices and by using a small pipe cutter onto the neck with a projectile inserted ( did this twice ....one cut long and one cut short )

So in theory it cost me two cases and two projectiles. In practice it was a couple more :):oh noes: