500Nitro
No doubt your choices are correct.
However, what I think hopdoc is trying to asertain is the actual number, that use in Africa, the
cartridges he has listed.

All the cartridges he listed get a lot of "talk" on this Forum, and on AR.

From the amount of forum discussion, these cartridges would seem to be hunted quite a lot.

None of the cartridges he has listed are "mainstream" cartridges.

I have used the 9,3x74R on 3 Safaris and the 450/400 3 1/4" on one. All in double rifles.

I Found them excellent in every way.