Sorry fellas; mixed my letters. Should have been CRF (for controlled round feed), not as I originally wrote. While I'm at it I'll address another question.
Mausers, M70s, the MausingField, and there are others, seize the round in its delivery from the magazine hence the controlled round feed nomenclature. The Mauser and the M70 (Pre-64 and Classic) also have a cone breech that adds reliability when chambering a round under stress or adverse conditions. Mechanical ejection is also a positive feature of these actions--that's what that big claw does in addition to the CRF action. There's another feature on the M70 I know works from experience and that's the way a firing mishap directs the gases and everything else down through the magazine (on the bullet end). I've stretched reloading cases a bit too far on a couple occasions. The primers blew out and the expanding gas vented as designed. Probably all actions have something similar--can't imagine they not--but I've actually experienced their behavior.
Probably most important for me though is that I've had to rely on two M70s (a Pre-War and Stainless Classic) on three instances. Had they failed I wouldn't be writing this. No doubt there's other actions that have "saved the day" but the confidence of African, Asian, and Alaskan guides, outfitters, and just plain residents for nearly a hundred years (more with the Mauser) led me to own and use them since 1965. I've refrained from claiming they're better than any other. Only that they're my preference and my reasons for that.
