I'm about to receive my new 6.5 CM barrel (hopefully) and screw it to my BIGHORN origin action. This is the 2nd rifle I rebarrel. I do not have a 6.5 creedmore headspace gauge. I was planning to use a brand new Laupa case and a headspace comparator. I've always just used a GO gauge and alumimum tape on it for NO GO. Is there something wrong with using a brand new case for a gauge. Of course I will double and triple check a few brand new cases with my headspace comparator.