The first day of a safari, your PH will say something like: "Let's go collect an animal for dinner, bwana." But what he's really saying is, Let's see how well you can shoot. This is your debut, and how the safari is conducted will depend largely on how competent or otherwise you prove yourself to be.
So in 1987, in Zambia, I had a PH named Abie DuPloy, and we went through this drill, and presently came on a herd of puku, which is a stocky, tough antelope of about 400 pounds. I was shooting a .338, which has plenty of wallop, whatever that is, and put the crosshairs on an attractive bull and pulled the trigger.