To check headspace you will need 2 gages: Forster Headspace Go Gage 30-06 Springfield and Forster Headspace Gage Field Length 30-06 Springfield. They are available thru internet retailers MidwayUsa and Brownells. To check for throat erosion and muzzle wear, I suggest you send a S.A.S.E. to Steven Matthews, PO Box 125, Scott, Ohio, 45886 for full info. Last I knew, his gage was $52 including shipping. Hope that helps.

Don