I have a 12 guage Ithaca deerslayer with a rifled barrel. I would never mistake that for a serious hunting rifle that I would base my whole trip half way around the world on. For the cost of the trip, the length of the flight and the anticipation of the adventure, a slug shooting rifle would be setting the foundation for a real catastrophic experience.
It's the plains game equivalent of the 45/70 for Dangerous game. Yeah it will kill DG, Yeah it has killed DG, but are you willing to wait for only the perfect situation, after spending a fortune and waiting in anxious anticipation for the events?
This is not fishing where we try to catch and release the biggest fish on the minimal equipment possible.
Yeah it will kill anything alive, if that's the question? No it's not at all even a remotely prudent choice with the other options available. Heck it's not even the prudent choice in the USA for deer unless it's the only option available! Now with that said, your more then welcome to hunt with me and bring it with you to hunt with. I don't care what anyone brings, you can come with an bring a spear for all I care. It's your money and your hunt. You deserve to make it what ever you want it to be within the law.