Remington 700 .223 chambering reloads problem
Sounds like the brass is not getting sized enough.
Continue turning the die into the press until the bolt will close on it.
Wrap a piece of masking tape around your die.
Make marks on the tape every 1mm.
As you turn the die down, each time you pass a 1mm tick mark, you have adjusted the die down another 0.001".
Make small adjustments, perhaps 0.002" at a time while checking for proper fit of the sized cases in the gun until you get to the right adjustment.