I've never hunted cape buff., but I have spoken with several PH's at length about preferred caliber and bullet selection. To a man, all stated they prefer a premium soft, with some solids on hand for follow-up "just in case".
As to which bullet.... all the bullets mentioned thus far on this thread were well represented. However, it is interesting to note, in all my discussions it was apparent that one particular bullet seemed to be preferred (and by a large margin) by the over whelming majority of PH's..... the A-frame.
