LPD17,
Congrat' s on the African trip. I' m envious, looks like you' ll be getting into some serious Big Game Hunting -- I hope you have a great trip.
With too few exceptions, this site (as great as it is) is fairly provincial and has a HEAVY North American (especially lower 48) bias and is pretty well " benchmarked" at whitetail deer and 30-06' s. Kudu, Eland, or Bongo hunting advice? --- I' m afraid that' s likely to be a bit of a stretch.
An appropriate website to find an abundance of experience based answers for your question would be
www.accuratereloading.com -- don' t let the name deceive you -- these guys are hard core African hunters. They have had a thread that is right on beam to your question within the last 2 or 3 weeks.
Never Go Undergunned,
EKM