OK, here is a trick, take a sacrificial shell holder and grind a bit off the top, this will allow you to push the case
further into the die. Die should be flush against the shell holder at full stroke.

If this does not work, have other ideas,

You have the Nitro dies, thought you were going to get some of the correct dies??

Mike


USAF RET 1971-95 [Linked Image from jpgbox.com]