which method are you using? My limited use of neck sizing has been with a lee collet die. I will say I'm very happy sizing brass with a Wilson full length bushing die.
Worth a repeat. Expander balls seem to be nothing but a way of generating problems.Full length without expander ball then set the tension with 21C mandrel
Not wasted at all, just get a Redding Body die for the calibers you have a good neck die for. It's two operations instead of one, but works the same.Sounds like maybe I've wasted a lot of money on neck sizing dies over the years, plus the whole extra trouble of additional dies, additional sorting, etc.