I don't know the answer to that. My Arg dies are Lyman. I always assumed that all the 7.65s would be the same. What reason would Mauser have to alter things
and make their supplying of ammo problematic ? They supplied Belgiumicon, Turkeyicon Spain and many South American countries with at least their initial ammo supply.
As for Remington brass, I do know that many people don't like it too much, for various reasons. I choose Winchester when there's a choice.