Not a gunwriter here, but since everyone seems to feel free to respond in this forum I'll go ahead and follow suit...any misstatements tend to be corrected by a bonafide genuine gunwriter anyway...
My own practice is to continue neck sizing only until I begin to notice undue or unusual effort required to lock the bolt down on a round. I'll make note of it and the next time I begin to process that batch of brass for a reload, I'll use a body die to bump the shoulder back two or three thousandths. A properly adjusted FL die will accomplish the task also.
Many say they never have to do this, but I often do myself. I suppose it may depend on the cartridge geometry, the rifle's chamber, the quality of the brass, maybe the pressures you're loading to, or a host of other factors such as the dies or other equipment.
That's my two cents worth, yours free.
