just to show how much of the necks get sized in my 30-06 using wilson bushing dies is less than half
l've chosen this round of mine because its more obvious being a factory chamber with 5 thou neck clearance
you can also see the very slight mark left from using a lee factory crimp die because this round has jump to the lands
this can be done with a FLS dies by putting an appropriate sized washer between the die and shell holder when setting the FLS die up, remove the washer to size the case, say 1mm thick washer for example but maybe more
the idea is that you will have a straighter to the bore sized case because the case and neck are still the same size as your chamber
but the sized part of the neck is enough to hold the bullet giving the right amount of neck tension
using the bushing dies you have no choice its how the case is sized, lMHO it is worth considering for precision shooting
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