Ruger #1, 458 Lott, should be fun enough. As a client you will never need to deal with a charge, as the PH will ALWAYS back you up. A bummer but the truth.

I will say, that if and when I go to Africa, I will insist on being at least within 50 yards of the buff before I take a shot. I will also only use a single or double with open sights. Otherwise, IMHO, its just shooting cows in a pen....that you had to hike 5 miles to get to.