Thanks for the quick replys. I did forget to mention that I am deburring the cases. This problem has just started with the last two batches that I have reloaded. As Cam2 said I am getting a cruching effect at the base of the neck. As far as I know the die depth has not changed. I have it locked in place now for about 7 years. Could the problem be from too much lube on the case when resizing and knocking out the primer? I have tried alot and a little but the problem still exists.