I knew muledeer would chime in on this.
Don't mess with the man's 338 Fed...
I've used mine only on Calif. hogs to date because it happens to shoot the 185-grain copper very well. Everything hit to date has died, out to 300.
If my memory is working properly today... I believe it was Greg Rodriguez who told me he has culled a ton of kudu with the 338 Fed and finds it wonderfully suited to the task.
All of which is fine with me, as I won't be asking my 338 Fed to do something my other 338s do better.