Neck sizing vs. FL sizing

[eridepilot]

So I'm sure this question has been asked here before. But here it is again. Neck sizing vs. Full length sizing?

I am reloading a variety of cases; .223, .270, .308, .338 rum. Is neck sizing these cases recommended? Will this preserve case life and give a better fit in the chamber of the rifle in which the case was fired in? Should .223 for the AR always be FL sized?

[ireload]

If you are shooting those calibers you stated in a bolt action, pump, or single shot, yes you can neck size. Semi often need to be full length sized.

[eridepilot]

The 308 is a Browning BLR. I have been using a short based full length die for that rifle.

[bruceflinch]

^ Yes. Semi auto's. FL size, then trim once .010-.020 under & FL size each reload, till they split. (generally)

Single shots. Trim .010 under. Shoot once. Then neck size & reload till they need trimming again.

[FLIGHT762]

I do not neck size for semi-autos, pumps or lever guns. I do neck only size for bolt guns. Just remember, you can neck size a few times,but you will have to F/L at some point.

Over the years, I've had to hammer the bolt open a number of times on neck only sized brass that got a little too big. I just had one a few weeks ago on a tight chamber rifle.

I will never neck size only for ammunition that will be used for hunting or for
SHTF.

[CK_32]

FL for semi auto rifles or pistols. Or first time brass.

Neck size for bolt action once fired brass from that same rifle.