I'm shooting a factory bolt Savage 223 and alway's neck size with Lee collet die. Just started annealing the brass for the first time and after neck sizing noticed they are hard to chamber. Seem's like the round goes in fine until about half way then I really have to force it to chamber. Does brass grow after the annealing process ? Measured with caliper and the fired cases measure's 1-2 thousanth's smaller than the unfired annealed case's. Chamber fine after FL sizing. Would rather just neck size. Can anyone give me a idea what is happening ? Am I doing something wrong with the annealing ? Thank's for any help.