Maybe everybody here understands that the straightwall FCD is a totally different kind of die from the bottleneck FCD, but, it seems to me, at least one member is confused.
As Vafisher says, the collet in the bottleneck FCD applies the crimp. If one reads and follows the instructions that came with the die, one will have success.
The FCD for straightwall cases does not use a collet for crimping, and it does contain a carbide sizing ring at the bottom of the die, for post-sizing brass.
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