Hei DLALLDER
there is nothing wrong 270 WSM for Africa. Maybe 150gr is to small for animals like Gemsbuck, Kudu, or Wildebeest but PH should know better. I take this spring in SA Kudu with 185gr Accubond 100yrds and my friend wildebeest with Norma oryx (similar bullets to Core Loks) 200yrds... Both shots was made with .30-06 and there was no difference...animals was down same place where bullet hit them.
NB! But prepare to make long range shots. In such ranges Core Loks is not the best as bullet drop is huge...