Quoted:
Why buy a case gage? You used the perfect gage, the rifle's chamber and bolt.
A fixed case gage will cause a poorer fit. An adjustable case gage such as the Hornady/Stoney point type allows a measurement of fired cases from which to set the sizer to produce sized cases with some minimal headspace.
But it's not necessary in your situation.
I can see your point above for reloading for the Savage.
I was thinking that if I were going to load for my AR's I would want to ensure that the cases were within factory/SAMMI specs so they would reliably feed and function no matter which gun they were used in. I could even use that ammo in my Savage too, if I needed more fire formed brass for it.
I was looking at the Wilson, Dillon, and Lyman case/headspace gauges and I see that some of them are for fired brass and some are for resized brass, and now I am more confused???
The adjustable one makes sense to me but would that be the best one for trying to reload for multiple AR's or other rifles?