Ah yes the very desirable Pre 64 M70.

At Gunmsithing school there was a student with a glass eye and plastic nose tip. Ruptured a primer in a M-70.

Next time you shoot your pre 64 M-70, as you aim in look down at the rear of the action and in particular the bolt lug race ways. Those raceways are pointed right at your face. If you rupture a case head or primer the gas is going to be vented right down that raceway and right into you face. So how often is that you are going to rupture a primer or case head? That's one lottery I don't want to play.

If you have a M-70 have a new bolt shroud with gas flange fit. It just might save your eyes.