70 mm rocket pods...

[Nik_SpeakerToCats]

Guided and un-guided 70mm rockets come in a wide range of types and warheads,

This query is about the unguided, retro variety extensively used by eg ground attack air-craft before the 'recent' range upgrade...

If one of these, in a pod or part-pod on eg a small-ish / support helo, were to be struck nose-on by a 50-cal from eg sniper / anti-materiel rifle, what happens ?

Does only the struck rocket cook-off / deflagrate disconcertingly ?
Do adjoining tubes 'Go Forrestal', too ??
All remaining loaded tubes ??

Or, simply, not openly documented, 'You have no need to know'...