If you're checking headspace by examining fired cases, you're not doing it right.
Remove the extractor from the bolt and insert a "go" gauge into the action. It should close.
Now try the same with the "no go" gauge. If it closes, it's probably over SAAMI specs.
If it closes on a "field" gauge, the barrel shank must be shortened to reduce the headspace and that means lathe time by the gunsmith.
Vigilantibus et non dormientibus jura subveniunt. Molon Labe!