500 grains, I agree--

Good try but I bet hunters buying African rifles will go for the classics- the popular 375, the 416 Rigby,the 458 WM, and the 404.. I think the 416 Rem has advantages due to the economy of a not requiring an oversize action type and more energy. Maybe after those, maybe the 400 tembo

I would buy a 404 and load it to 2300fps long before buying the 400 Tembo. More African lore associated with it,etc

Sorry, but I wouldn't have wasted the effort.I may be wrong here but I see its existence as short indeed.