What is the thread size on a Hornady OAL gauge ?

[CRJR]

What size drill and tap will I need ?
Thank you

[Wildcat]

5/16″ x 36 threads per inch
Link below may also be useful
http://bulletin.accurateshooter.com/2015/04/make-your-own-modified-case-for-hornady-o-a-l-gauge/

[PhilC]

Copper Creek Ammo will drill and tap your fireformed brass for $9 - https://coppercreekcartridgeco.com/product/send-it-mc/

[CRJR]

Thanks guys !

[Dave Hoback]

I made my own. Just tapped it 5/16-24.