Greetings again @csmiffy,
Fished the bolt out of the safe and compared the extractor with the photographs of the M17 and P14 bolt faces in the de Hass book on bolt action rifles. My extractor is not the P14 but more like the M17 with a little relieved at the bottom edge to clear the bolt face. Extractor width is 14mm. I measured the extractor groove and rim of a CAC .308 case and the body dia of a PPU .303 case and found that an extractor that reached the head dia of the .303 would only have a grip of 0.33mm on the .308 rim. I also slipped the .308 case rim under the extractor and into the bolt face. The extractor seemed to reach the bottom of the groove and the case had to be snapped out. Some current .308 cases may have smaller dia rims. Finding a M17 extractor may be a big ask at this stage, and may need to be modified to fit, so this would leave building up the existing one with weld and machining to fit the only option. Not a job for the back yard gunsmith.
Regards Grandpamac.
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