Most dies need to be set about 1/4 turn below where it hits the shell holder so that the die "cams over" as in these RCBS instructions
www.rcbs.com/downloads...ctions.pdf
What happens is that when the die starts contacting the case at the pressure ring it will squeeze the case body and move the shoulder forward, much like squeezing a baloon. Once this happens you have to set the die low enough so that it contacts and pushes the shoulder back.
If your chamber is "short-shouldered" so that the die can not be adjusted low enough to push the shoulder back then that is the time you have to take some material off the shell holder or the bottom of the die. I have had to do this for a short-shouldered Remington 22-250 and it is not easy. A file would not do anything to the shell holder or die that I had. They were both hardened. Took it to a machinist and he took off some off the die and the problem was solved.