The big challenge is the suppliers in South Africa and then the availability of propellant.
we have a new supplier of blackpowder, so thats sorted but the most common brand of muzzy's are CVA and Traditions. TC is a little more scarce but that basically covers the available brands.
As I live in the drier region we have to shoot longer distances, between 200-300yards during daytime that is. Its a struggle to get any muzzy to shoot that far except maybe the Knights from what I have seen on videos. Smokeless powders - not available over here...