Originally Posted by
RC20
Good questions.
Not my expertise at all, but have not seen a response, here goes
The large shank was originally if I have it right a Short Magnum response to case swelling.
So yes, that's why its large.
Bolts are the same, only the head changes.
338 Norma is not one I am familiar with, I don't even know if its belted.
I think the design has then shifted to large shank for the belted magnums but I think that is some and some and not all are.
On the other hand, at least belted magnums were made in normal shank for a very long time.
Maybe a bit of insurance.
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