Always take 2 rifles so on the last day of your hunt and the animals haven't cooperated by letting your bow hunting buddy to get close enough for a shot, he can borrow your rifle to get his Roosevelt Sable.
I have gone on 12 international hunts (6 in Africa) and only once did I take two rifles, my .375 RUM for buffalo and a 7 mm RM for plains game. I ended up shooting about half of my PG on that trip with my .375 RUM because on many of our stalks it was just 3 of us, myself, my PH, and the head tracker and I didn't want to ask them to carry a second rifle for me.
On two of my African hunts I did borrow a rifle from my PW. The first time was a South African hunt that I only brought my .375 RUM, and one of the animals that I wanted to hunt was a Cape Grysbok. If I got one I wanted to have a full mount of him and I thought a 270 gr Barnes TSX at 3043 fps would cause too much damage (like it had done earlier on a Steenbuck and a Jackal) so I borrowed a .308 Win with FMJ bullets from the landowner, and one of them worked perfectly on my Grysbok.
On my next South African hunt, 2 of the animals that I wanted to hunt were an African Civet and a Caracal. I only took my .300 Weatherby on that hunt, but I had worked up a load with 150 gr FMJ bullets for it for those small cats. On the last night of that hunt we sat in a blind that overlooked a field where the camp disposed of the animal parts that the camp staff didn't eat. It would be a little over a 100 yd shot.
The first animal to come in was a Civet, and my 150 gr FMJ bullet basically killed him instantly. My PH wanted to wait to go down to get him, and a while later a Caracal came in. When I squeezed the trigger of my .300 Wby there was just a loud CLICK. I was sure that I had cycled a new shell into the chamber after I shot the Civet, but when I worked the bolt, a new shell would not chamber. With my first shot, the primer did not ignite the powder, but it had enough force to push the bullet into the barrel.
Luckily, my PH had a .22 LR rifle in the truck, which he got, and my first shot hit, but did not kill the Caracal. My PH then told my that there were only 2 cartridges for that rifle, and I had just shot one. I was confident that I could make the last bullet count, which I did because we didn't have any other guns with us.
The next day...