OK my personal choices for a reasonable African hunting battery.

Usually a maximum of two firearms could be actually carried, perhaps with a set of shotgun barrels.

I would probably take a medium calibre plus a double rifle on a planned safari, depending on the chosen hunts/target game. Inreality probably a .400 or a .450, plus a .300 or 8mm. (I don't own all of these yet).

Plains game:

1. 6.5x68 takedown bolt action, scoped - for flat shooting at smaller medium sized game - if needed;
2. .30-06 M98, scoped or a .300 H&H Mag M98, scoped, perferably a takedown;
3. 8x68S takedown bolt action, scoped;
4. 9.3x74R, scoped double rifle;
No.s 5 and 6:
Not ideal for plains game but if it is the 'smaller' calibre along it will do.
5. .375 H&H M98, scoped;
6. .500/.416 or a .400 Double rifle, scoped.

Elephant, buffalo, rhino (fat chance of that!), plus other big game:

1. .375 H&H M98, scoped in QD mounts;
2. .500/.416 or a .400 Double rifle, scoped or unscoped with QD mounts;
3. .450 No. 2 NE Double rifle, unscoped.

For feathers:

1. .500/.416 or a .400 Double rifle, with set of shotgun barrels.
2. 9.3x74R Valmet DR with 12g U/O shottie barrels.

For a client who is not as concerned with meat damage I don't see the need to go less than a .30 calibre. Unless one wants a really flat shooting rifle such as a 6.5x68 if a lot of smaller medium sized game would be hunted.