Strip your bolt down and put the cases in the chamber. You must take the firing control group and the ejector out of the bolt, there's no way around it. No tape on the cases, no marker, nada, zilch, nothing. Does the bolt close? Then size the neck only and shoot it again. Find an actual neck sizing die, or take the largest bushing die you have that won't touch this case at all and set it size about half the neck. Shoot and neck size until the cases don't fit. Don't worry that they're different lengths, don't size them and don't trim them until the cases don't fit anymore.
Then you can "bump" the shoulders. Do it only 0.001" if you have a die capable of that. Get a Whidden click ring if you aren't used to timing a die accurately.