I personally witnessed two 30-06 700's fire when the two-position safety was pushed to the fire mode. In both cases they were different guns, different owners, both guns were never trusted afterwards. the older rifles had the two-position safety that had to be moved to fire before the bolt would open to unload the gun, seems the newer guns have three position safety.
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I have an older Rem 742 30-06, great gun, never jammed but I was warned it always needed to slam shut using the bolt release for the breech to close tight