I have my standard die kit with a FS die & a second die set for neck sizing only. The NS die set AND the FS die set both have a FS die with decapping pin.

Now, when I FS a 30.06 case & check headspace, I get good readings - ie less than .004" but slightly more than .002" headspace measurement.
When I use the FS die from the neck sizing kit headspace is now up to .008" ???

So... I guess I have to ask - Is it possible to size brass with standard dies & adjust them up / down & end up with the case shoulder bumped back or moved longer?

I stumbled upon this when I checked the HS on my '06 using the "freshly FS'ed brass & .002" scotch tape method". I readjusted my dies (both) and ran a few more pieces of brass. Same results.
Would it be reasonable to assume the one die is cut differently than the other?

Whatcha think ???