Re: Neck sizing with a F/L die
Maybe. Sometimes anyway. Depends a whole lot on 1) how you do it, 2) the case shape and 3) the actual dimensions of your die. If you die contacts any portion of the case so it changes it, you ain't neck sizing, you are only partial FL sizing.
1) There is no point in neck sizing below the base of a seated bullet.
2) You can easily neck size a steeply tapered case such as a 30-30 or .303 with a FL die. Not nearly so easy with a nearly straight case such as the WSM types.
3) If your chamber is on the small size of tolerance and your die is on the large size you might get away with it. Experiment to see how far down you will need to set the die to reach the bullet base. Then take another case, paint the whole body with a felt tip pin and try sizing, you won't need any body lube if it works. Run the case up the die until it gets tight, pull it out and check the body for ink reemoval. If the ink is scuffed off the body, stop and forget it. If not, figger the resistance is the neck. Repeat, push it further and remove again to check for rubbing again (don't want to stick the case, do we!).
If you can get the neck sized as far down as needed without rubbing the ink off the body, you are home free.