PTA, 4.27, 4.40, and Axis action all use the same short action bolt heads.
All of the parts (ejector, extractor, etc.) are the same as factory.
With one exception all bolt heads use the same extractor, the exception is the CRF heads. IIRC SSS used to offer a special extractor to convert standard Savage heads to work with the PPC sized cases, but bolt heads that are setup for the PPC should use standard extractors.
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