Thanks for the replies. I have tried every possible die adjustment, to no availe. I contacted Hornady and they told me to send them the die and a few cases. All cases were trimmed. The die just seems to be too shallow and not allow the case to be resized all the way. Herman, thanks for the measurements. They match mine and I assume that' s normal. I think I' m going to send the die in. The folks at Hornady were very helpful on the phone. I have never experienced this sort of problem before with any cartridge. Of course the short mags are sort of new, so there may be some bugs to work out.
Thanks again for the replies