Hi Tim,
Best the New Year to you to.
Being from South Africa, I can confirm that the .303 will be the perfect bush rifle. In fact, the perfect battery can possibly be the .303 and a .375 (scoped), as long as you have a PH with something bigger for the dangerous moments. In the Eastern and Northern Cape and Namibia the flatter shooting cartridges (300Win Mag)are necessary. I don't know whether you've been in SA before but I am sure you are going to find it very good: hospital people, good food and great hunting!
Enjoy!
Charls