Thread: Collet getting pushed up

Sorry, don't quite understand your question. You mention collet but your die would not seem to be a Lee Collet die. Is it an early Hornady die in which case @woods223 is on to it with bottoming out?

I had an early Hornady die and it drove me nuts. More when pulling the expander ball back thru the neck. I could not get the stupid locking nut tight enough to stop the shaft from slipping. Hornady later modified the decapping rod/expander ball shaft by putting ridges on it to stop it slipping.