If your criterion for "double rifle cartridge" is that it is rimmed so that it cna be reliably ejected, I have two questions:

1. If it's a long range cartridge, it's not a life-and-death thing if it doesn't eject. That said, there are many here that feel that rimless cartridges eject just fine. I'd like to read what people have to say about that.

2. But I can see why you'd want it to eject every time, so question 1 is a bit void. Still, it seems like it would easier if rifle-makers could come up with a way to eject rimless cartridges reliabely than to keep using bizarre, wildcatted ammo that simply replicates a standard load anyway. Why have a rimmed .30-06 equivalent if a standard .30-06 could be ejected fine, with a new system?