I suppose there is no real answer to the question.
As long as they can be transferred freely, vintage doubles will end up with high pressure cartridges stuck in them.
I'm only breaking targets with them most of the time anyway. I don't need the heavy artillery to do that. Broke two stocks on the same day shooting Estate 1.125oz shells. One a Flues, the other a Nitro Special. YMMV


Out there doing it best I can.