Re: New 308 brasss, full size? neck size? or ......
Since the brass is new the body is sized correctly as it comes. But the necks on some will be dinged, bent and/or distorted by the packaging method used for shipping (thrown into a box or plastic bag and banged around). I would at least neck size them all just to be sure. The trim length should be checked on about 10 cases randomly picked. I would be very surprised to find a lot of new brass that required trimming. Remember that this new brass, if it had been diverted to the ammo manufacturing line, would have been reloaded directly without sizing, trimming, or anything. I always chamfer the case's necks to be sure the bullets will enter the case without the bullets catching on a burr.