Question?
Where is the stress point on the action?
Not talking about the bolt, but the action?
How much space is there between the bolt face when fully open, and the back of the port on the action?
How much more is needed to extract at least the empty case?
One of my guns is a 40x Rem single shot action.
A 40x Rem is a short action,308 length.
Mine is chambered for a 300 Wby case, and i can load a loaded round and extract an empty round without pulling the bolt.
But i couldnt do that as the gun left the factory.
I also used a custom Hart action also 308 length, for a 378 Wby case by doing the same thing.