Based on your Santa post, I'm pretty sure why your FCD die is not working right.
If you are forming brass from 223, and not reaming or turning the necks, then your necks are way too thick, preventing them from going into the collet. You are essentially turning the FCD die into a conventional crimp die, as which it would work very poorly if at all.
Try some factory 300 BLK brass, I'll bet you get a completely different result.
To crimp the thick necks you might be able to spread the fingers of the collet a little.
__________________
Jim
CBOB0497
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