Last time I was over there it was roughly 6 Rand to the Dollar. The Dutch guns were smooth bore 4 bores and I don't remember what he used when he transitioned to rounds like the .303 British. Frankly, I expect any 4 bore to be very punishing no matter how modern its design. I imagine that Mkonto will find that their .451 version will be their big seller and used primarily for African plains game.