I do a partial FL sizing,IF the brass was fired in the rifle I plan to use the ammo in, and/or it will chamber easily before sizing, I just run the cases into the FL die just about one caliber to get enough neck tension to securely hold the new bullet - .3" for .30 caliber, etc.

FL sizing is reserved for cases that are too oversize in some dimension to freely chamber in the rifle they will be used in next.

The less you work the brass, the longer the cases will last.