If it were me, I'd take a deprimed fired neck sized case, check trim length, trim if necessary. If the length is OK, try it in the chamber. If it fits, your done.
If it won't fit (more likely), put the FL sizing die in the press but set it up with a .025" feeler gage between the bottom of the die and the top of the shell holder with the press at the top of it's stroke.
Lube the case and size it. Try it in the chamber. If it doesn't go, reset the die with a .020" feeler gage. Try it in the chamber. Repeat with thinner feeler gages till it just fits. Tighten the set screw in the lock ring, or what ever locks the ring to the die.
Use that die setting and full length resize the brass. It will always fit and you will be bumping the shoulders as little as possible to have it fit.
This is how I size my hunting ammo for all my hunting rifles including my Savage Model 12 .22-250. I've not had good experiences with neck sizing only in factory chambers.
Trust me on this, I hate it when a round won't load in the field and the second ground hog gets away. Bad words don't help either.