I'm brand new to reloading and just got my Hornady LNL progressive set up. I'm setting up my dies per the instructions, and for the life of me can't figure out what I'm doing wrong. I have the RCBS AR 223 2 piece die set. The first die is a deprimer and full length sizer. After I size the case, the bullet will easily slide all the way through the neck and into the case. I have the depriming pin set right, and don't see a way to change the sizer. Any of you with more experience than I able to she'd some light?