I have a 8mm REM mag case, and I'm try to figure out the minimum case wall thickness when turning it down. What do you think the minimum thickness can be before something bad happens????? Do you think the best method of neck turning is outside or inside? It's a 8mm necked down to 30cal. So the case gets resized, I have been turning only fireformed brass after resizing. How much variance of wall thinkness do you think you should see? Thanks for the help.