Gentlemen
I once handled a British double rifle in 450/400 with 21 inch barrels.

That would make a great "Jungle Double" IMHO.

However there is a Germen fella that does some hunting in the African jungle that used reduced loads in his bulpup, 460 Wby no less, for smaller game.

Still after using Drillings for several years I think the ideal "modern" jungle gun would be a drilling.

In South American jungles I think 2 shotgun bbls and one rifle bbl [conventional drilling] would be best as there are not a lot of BIG dangerous animals.

However in Africa, where buff and elephants are present I would want a double rifle drilling [2 rifle bbls and one shotgun bbl], in a calibre I felt comfortable with.

Several companies make 9,3x74R double rifle drillings, but Krieghoff makes an "African Double Rifle Drilling" in calibres such as 375 Flanged, 500/416, and 470, along with a 20 ga bbl.

I do know next time I go back to Africa my Blaser D99 Duo in 9,3x74Rx9,3x74Rx20 ga 3" [scoped] will definately make the trip.