From Kudu to Whitetail is long way to go...LOL therefore 180gr is much better option. ...have shoot myself two kudu..one with 9,3x64 293gr RWS UC and other with 30-06 and 180gr Nosler AccuBond...both faild same place where take hit...
Same time my friend run after Kudu long way even he shoot with 180gr Norma Oryx in very right place (shoulder).
30-06 and 165gr might be enough but better is to be sure and use 180gr...