George,
Another true story: A few years ago an older friend from Montana was going on his long dreamed-of African hunt, planning to take the standard selection of plains game, including kudu, blue wilderbeest and gemsbok. He asked if the .270 he'd used in Montana for many years on everything from antelope to elk was enough, or if he needed a bigger rifle. I said the .270 would work great, with good bullets, specifically suggesting either Barnes TTSX's or 150 Partitions.
When he came back he insisted on buying me and Eileen dinner as thanks, because his .270 had worked so well, and due to not having to buy another rifle he could also afford another animal over there.
Unfortunately, I'm not sure exactly what bullet he used, but have seen both work fine over there.
