Anyone else notice your case length shortens just a bit after expanding the neck with an expander die such as the Sinclair? My 06 brass shortens about 5-6 thousandths from the full length sizing to finishing with the neck expander die. Just wondering how common this is with others. Thanks for any feedback. Not sure if it has any practical impact.
I read your comment and then went and expanded necks on .270 Win brass and .308 brass with a Sinclair expander mandrel. I measured each before and after and no shrinkage or growth of any type. Sounds like you are screwing the mandrel die in too much.
