BIGCOUNTRY,
The method I use to solve this problem starts with the use of a universal depriming die. This lets me clean primer pockets before tumbling cases. During resizing, with a case in the die,I raise the expander button until it touches the inside of the case. I lower the expander button about half the length of the case neck and lower the case until the neck is still in the sizing portion of the die, and on the expander button. Tighten the expander button stem and this should be the end of this problem. If the die is not aligned to the axis of the press ram, the entire case will still be misaligned. I hope that this is of some help. Good luck.

BigBob .30-06