Did some quick research, not exhaustive.

Seems there is a lack of facts of C96 being blown up or destroyed by the cartridges used.
Seems the velocity and bullet weight of both cartridges are similar.

Might be we are perpetualising a myth.

Having said that, I wouldn't want to shoot a well-worn firearm with doubtful cartridges and would probably reload up to where the gun functions satisfactory and leave it there.