/\/\ This/\/\case in shell holder , ram up no die , lift seater high in die body. die in until feel touch , back off 1/4 turn, adjust seater stem down to your COAL
use the longest case or trim all to match the one you used to set up
He may need to back out closer to 1 or 1 1/4 rounds off of shell holder to be sure not to engage crimp curl... If his die has one.
But... I really don't think that's his tight neck problem.