Do you have a case length gauge?
I would think the shell holder should be touching the bottom of the die or at least screwed in further. The only set up instructions I have here for standard shell holders and sizing dies says to screw the die in until it touches the raised ram and then lower the ram and screw in the die a further ¼ turn - these are for RCBS and Lee dies. You can buy sets of shell holders that are thicker or thinner to adjust the headspace.
Also make sure you are using enough lube especially in the neck if using an expander, as I have heard of cases being stretched a bit by stiff extraction from the die.
If you have a headspace comparator and calipers check the resized cases against a fired one and a factory loaded case if you have one. If the resized case is longer than a fired one either remove the expander or screw the die in more.
ETA
RCBS Instructions
Lee Instructions