I don't believe there were many to succeed or fail.

As for reliability and choices, people make their own choices. Magnum belted cartridges or rimless in double rifles. No ideal as rimmed but a choice.

I've a non controlled feed Mauser M03 in .404. Admittedly not used much yet. But by popular wisdom only a controlled feed rifle is a DGR. I'll see with time.

People make their own choices and live with them.

I do find a .425 WR cartridge DR a little silly. Interesting but silly. But say having a DR and magazine rifle in the same cartridge can make sense.