am a rookie at this but have a ?. fired 60 factory rounds in a new 25-06 brux barrel for my fireformed brass cases. this brass, untouched, now closes easily after firing.havent done anything to them. measure out at 2.484,2.485. i then took 6 cases,once fired only in my OTHER 25-06,FL sized them,knocked out primers,trimed them to .001,.002 shorter than brux fireformed cases. tried to close bolt on these 6 in the brux chamber.the best were somewhat difficult to chamber,a couple were quite hard to chamber.can someone tell me what i am missing here. thank you very much. can be reached at email rrhogueiii@aol.com