I have a semi-auto 30-06 . I FL size (have adjusted and re-adjusted/set the die to man. specs) measuring headspace with a StoneyPoint gauge avr. length is 4.048 .048 being the critical # after firing ( the gun cycles smooth and flawlessly) cases measure 4.042 ------------- .048 ---.042 am I missing something ? how is this possible ? has anyone had this experience? .006 shorter and I have checked these #s 10x