Or you COULD just use a pony-tail tie around the base of your fresh rounds, fire them like that and let them expand to fill the chamber, thus fitting them to YOUR rifle.
Then you neck-size only and your brass lasts bout 20 shots instead of 3.
But then, if you anneal the case-mouths every 10 shots and us a sane load, your brass might last halfway to forever.
Cheaper than gauges, too.
BTW, MIN is .064" MAX is .074".
Out-of-spec RIMS can give as much as .025" execss headspace on a perfect rifle.