Apparently packing in Africa used to be allowed. Ross Seyfried has packed one and even shot a cape buffalo with one. I do not know which "Country" he hunted it or what permits were required, nor how he managed to get it there and through customs.
Here, up until recently, game guides & some bush workers could get a permit to pack something .357 mag or more powerful as a bear deterrent.
Now, I suspect that would be impossible but I have not heard that current have been revoked.