I'm sure you're convinced by now, but to chime in, I used (almost) the same rifle on most the same animals you mention including Kudu (mine was a Tikka superlite 30-06). I was shooting 150 Etips and worked perfectly on everything I shot, just like it does here. If I did it over, the only thing I'd probably change is taking my Montana in 308 instead, just because I like it a -little- bit more than the Tikka.
