I'm sure John Hunter said never to take your eyes off the animal ,and to use a stopping round ,for me it would need to be a 500 NE or 577 NE/585 ,and at least to me, reloading your rifle without looking at it, and keep your eyes on the animal ,that's just my view ,Not saying I could have done it better, but we all can learn something from this ,Cape Buffalo being a big solid animal ,i've shot about 70 Water buffalo with a 378,458 Lott ,470 NE and 585 ,hopefully will get a Cape Buffalo some day.