Ok I spoke to my Gunsmith that chamberd my rifle (6x284)I'd fire a round then eject it. And then try to insert a bullet into fired case. They don't fit. He says I don't have a tight neck. He said i have an anealing problem. I said I have brand new brass. He said that doesn't matter.The brass is too hard its not exspanding like its supposed to. The loaded rnd Neck Diameter is .274 Lapua Brass. The fired case is also .274 Lapua brass has 6 fireings. Now Norma brass with 1 fireing. Loaded rnd .268 fired .270. So what is my next thing I should do?