Anybody make a throat erosion gauge for AR15 based 6.5 Grendel.

[Bwild97]

With the Hornady AOL gauge you will need the modified case for the chamber you wish to track, pick a projectile any projectile, lable it or mark it so that it will be identified as the one you will use the every time you want to check for erosion. Keep a log and record the measurement every time you measure.

You can also use the RCBS OAL gauge, the nice thing about this gauge is that comes with an arbitrarily shaped projectile that can not be misplaced.

But as LRRPF52 mentioned "Throat Erosion" in the 6.5 Grendel is basically an oxymoron.