I've done that with several rounds. If you're using the collet neck sizer, you don't really need the FL sizer. It makes a nice body die and the price is right. Just grind out enough neck so the case neck doesn't touch, doesn't take that much. Those dies are hard and grinding is the only way to remove material. An old Dremel carbide tip, one that has worn down a bit, will fit in the die neck, even a .22-250, which is another one I did.
To me the Lee collet neck sizer is a sleeper, one of the best sizers for concentric ammo. It's as good as the premium sizers, IMO. And a lot cheaper.
DF