Another way to help set your full length sizing die up in tiny, accurate increments in height for desired fired case shoulder setback:
http://s860.photobucket.com/user/jep...ent-1.jpg.html
If your die won't set the case shoulder back far enough, grind off a bit of the die's bottom or slide a feeler gauge between the case head and shellholder before sizing the case; correct thickness, naturally.