Why can other people come to SA and hunt with big-bore airguns but the people who live there are limited to 22 cal?
In South Africa, each air rifle that is bigger than 5.5mm caliber must be licensed. It’s not that they are illegal, but each separate rifle or barrel must be licensed. The licensing procedure here can take from 4 months up to a year with lots of motivations and hassle so that’s why not many guys here purchase large cal air rifles, if we are going through all that hassle, we would rather purchase and license a centre fire rifle.
For foreigners coming here to hunt with their own rifles, a temporary import permit is required, whether for a centre fire or a large cal air rifle. That is often quicker to obtain and would require a letter of motivation from the hunting outfitter, or sports body you are representing, etc
In South Africa the licensing and control of firearms is carried out by the police services, they have been mandated by the government to reduce the number of firearms held by the public, that is why the licensing of a new firearm takes so long and the process is so difficult. Often licenses are refused for no good reason and must then be appealed with huge time and cost factors, often involving lawyers.