Your real concern on regulation is this:

As you've been developing those nice looking loads we see in that ammunition belt, it's quite possible that the wrist of that stock has been flexing more than a good and sound stock would.
Getting that gun re-stocked will very likely make the gun more rigid and less active through the wrist.
You might find that the load you have there may need to be adjusted in order to get the gun shooting properly again.

Would you need to have the gun re-regulated?
Maybe.
Judging by the looks of it, the energy and expense of a new stock and re-regulation would be worth it.

Sorry to see the wood's gone chooch on such a nice piece, but it seems that you saw it coming, so carry on and stay in the fight!

Cheers
Tinker