Quote Originally Posted by Parabuteo View Post
Neck turning is also pointless unless you ream as well, otherwise you thin out from the outside but still have thickness on the inner neck. The error starts with a blank that is slightly thicker on one side and is drawn rather than formed over a patern so the error will draw with the forming process (as it is not extruded through a form) and flow forward until the case is discarded or seperated.

IF you wanted to be super anal you would clean, weigh, anneal, collet size or ream/Turn, then trim for every firing. This may explain why the Lee collet die was popular with stateside BR shooters as it did the inside and outside against a plug.
https://www.youtube.com/watch?v=H_eX6-X2Kxg a lot of people swear by them and it will be brass once fired in my rifle