Thread: Bolt interchangeability question

My neighbour has two rifles but one bolt is still in Storage elsewhere. The rifles are:

.270 Ruger M77 Mk 2 no bolt

.3006 M77 Hawkeye with bolt.

The ‘06 bolt fits the .270, loads and eject a round as expected, but would it be safe to shoot. My thinking is that cases are the same with the exception of neck size, .270 being necked down. I am loathe to try a live fire on his behalf and have suggested he waits for the proper bolt to be returned. Comments appreciated.