Do the resized/reloaded cases chamber in the rife without a problem? If they do I wouldn't worry about it.
If they don't chamber...are you certain your sizing die is coming down far enough on the case? Re-adjust the sizing die bringing it down some, resize some different cases and see how the measure. If th ey measurement is smaller reload them and see how they chamber. If that does work maybe your sizing die is defective.
NYHunter