Not a chance they need to be FL resized. I have been loading for 45 years, and have never FL sized any new brass.....and never an issue. However, as has been noted by another poster, neck sizing to be sure the necks are concentric, then chamfering the inside of the neck, are important steps in prepping new brass. It is extremely rare to find new brass that is overlength, but still worth checking to be sure none are too long. I always trim after the first firing, since the length will change the first time you fire them, and occasionally they will actually be shorter after firing once. Regards, Eagleye.