Originally Posted by ellenbr
But what about the cartridge Ford, the cartridge?

It, and its raison d'être, are well described in the RWS Blue Bible (which these days is also online accessible).

Last made in the 1950s, and maybe in the early 1960s:
https://auctions.springer-vienna.com/Lots/Images/1-2102-144819.jpg

As you know, and as was mentioned above, the concept was revived and taken up by Krieghoff/Norma (with Wolfgang Romey as midwife) over half a century later, in their semi-proprietary 6x70R.

https://www.pirsch.de/ausruestung/munition/kaliber-6-x-70-r-krieghoffs-kipplauf-schoepfung-40835