i just bought a 7mm stw and 2 bags of new brass do i need to full length size the new brass? or can i just neck size it? reason i ask is because it would save me some money not buying a full length die, as i already bought a competition bullet seating die and would just buy a neck sizer. thanks!
Go with what he said. Though, I know you do not have to re-size them. I never have, I don't prep the case until it has been fired once. But I am sure that it would not hurt, and most likely even help, for you to re-size them.