I wouldn't think twice about using a 225 gr. Barnes TSX. With 58 gr. of CFE 223 you should be at 2730 fps +/-. That gives you a realistic 350 yard load with velocity still at ~2000 fps which is plenty for the TSX to still open up and perform.
FWIW - I have shot an Eland, Kudu, 2 Wildebeest, 2...