The CRF rifles I have don't double feed like your new M70 does.
I cycled my 1909 Mauser 30-06, Pre-64 M70 Custom 300 Win. Mag. and Styer Daimler .358 Win. Mannlicher. They will not double feed like you say your post 64 M70 (Classic?) does!
The cartridge rim snapped under the extractor immediately with significant force with the Mauser, Steyr and M70 and their extractors had complete control over the cartridge.
Yeah, I'm gonna have to go ahead and say that's total horse [bleep] and it's not how CRF works. I just tried it on my Husq 96 Mauser and it is possible to jam it in the same way.
