The CZ 527 does not have a Mauser style controlled-feed extractor, it's closer to Sako push-feed style.
If a push-feed rifle fails to extract, you re-close the bolt and give it another go. You also investigate the load to see if might be a bit too hot.
Calling Savage sounds like the best course of action, if you are shooting factory loads.
I'm assuming here that you have already the removed the extractor and cleaned everything associated with it thoroughly, when you replaced the spring.
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