FWIW...
When we are on a hunting safari in the bush, we always carry at least a couple of AKs. Sometimes more than a couple. At times a PK machine gun too, depending on the neighborhood...
These are not for four-legged predators, but for two-legged ones: poachers, shuftas, tribal warriors, and other ill-tempered critters. A SKS would be used for exactly the same purpose, in places where semi-auto AKs are not available.
Very, very few animals may attack unprovoked, out of the blue (or rather, out of the bush) when you're walking around, and these are mostly wounded or cantakerous old cape buffalo, and elephant. For both of these, a 7.62x39 is a really poor choice, due to bullet construction and shape: the trajectory of a mil-specs 7.62x39 round in an animal is totally unpredictable, it is deflected by bones and even hide, and cannot be relied upon to reach a vital organ in time to stop a charge.