pilot dc,
For the sake of science I just sized a .223 case in my 22/250 die. Only the last .100" of the neck is sized, but if you are happy with that it will get you shooting. There's no law that says you have to size the entire neck, some do this deliberately to aid in centering the cartridge in the chamber. I have used .308 collet dies to neck size 30-30, just to get away from lubing the cases.