loaded case is .292
Norma brass... neck thickness is .015
fired case is .297
You must be using a caliper for all your measuring. You can't measure brass neck thickness correctly with a caliper. The jaws are cut square and will not contact the ID of the neck correctly. Your measurement will always be thicker than what it really is. The smaller the caliber the more the measurement will be off. Your thickness measurement is off .001".
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