What vapodog said is true. Full length resizing (not partial full length resizing) will enable that brass to be used in any rifle chambered for that particular cartridge. Of course the load would have to be reworked from scratch if the brass was going to be used in a different rifle.

Now if you're interested in maximum accuracy and you're going to neck size (or partial full length resize) that batch ofbrass, then yes, you'd want to limit it to the rifle it was originally shot in.