Nope, you're set. But I would make sure I was shooting at least a Partition or preferably which one of these shoots the most accurately A-Frame / TSX (or TTSX) or North Fork softs in 200gr. These latter three will hold their weight. A 180gr at Jarrett speeds in something like a Nosler Ballistic Tip would be a concern to me, don't want the bullet to blow up on impact.
Welcome to AH David! Sounds like you have'm covered nothing in South Africa you guys can't handle. If you haven't got the hunt booked yet be sure to check out the outfitters here on AH you may want to give the new guy Hennie a look they Have some outstanding prices I mean like Mountain reedbuck for 300 dollars, check them all out.