I have done it. First anneal the neck, then lube well, then run it through your die a little at a time slowly, then turn the necks since they will be a bit thick, then trim, chamfer, and deburr. I do all this in a Redding body die and a Lee collet neck sizer. I’ve never shot any of the ones I’ve done, loaded up a few dummies and they cycled fine in both my bolt gun and gas gun. So I would imagine they would shoot fine. I don’t really need them since I have a ton of factory and starling brass, but it was just an exercise to see if I could do it in a pinch.