I have Clymer Hs gauges that I can use on various 3006 rifles but use a dummy round of HXP ball to make sure bolt/barrel fit is gtg.
I also have handguard pliers a gas cylinder/receiver wrench and a pull through PTG reamer for 06 service rifles.
I also have replica badger ordnance barrel alignment index tool fashioned from aluminum bars and some trued steel locks/parallel clamps.
A ratcheting chamber brush and chamber mirror.
I like to work on all my own rifles.