The load: Well clearly the load is beyond the stated maximum from Hodgdon today. But it may not be beyond maximum of 10 years ago (you’d have to look at the book to verify that).
Even then max loads were less than 80 Grs
I believe you, but I didn't know for sure. Regardless, that action shouldn't have come open for ANY reason. You should have a completely blown barrel, with the action still closed. You won't see any other gun coming open, even with an overload.
