Digital calipers...


Veteran member
Apr 25, 2016
Cedar Rapids, IA
If you have the budget, a good set of old school Mitutoyo dial calipers are the way go IMO; no batteries to fuss with.

I use these for general purpose reloading measurements within 0.001":

They're a cheap Chinese knockoff; I've checked mine against calibration standards and they do what they're advertised to do. Bear in mind, I reload for hunting/hobby; I'm not a competition/ or ultra long rangeshooter. 😃

(corrected tolerance & link to caliper model in edit)
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Veteran member
Mar 28, 2016
Gypsum, Co
We got along for years with just a case gauge and no calipers. Now calipers are cheap enough that you can find them anywhere from $15 on up.