Assuming the both shoot equally I prefer the TTSX on plains game as the flex tip does initiate and control expansion on medium size and smaller game (medium as in all the plains game as opposed to DG) on DG I way prefer the TSX as they don’t make the tipped bullet for most big bore cartridges anyway and I want that bullet to penetrate a bit before initiating expansion.
I would recommend bumping up to 180gr bullet because of the zebra, and really a 190 or higher. Zebra are tough as hell. I’ve shot 2 and my daughter has shot 1. My daughter and my second one we found readily. My first, by all accounts it looked like a very solid quartering away hit. Zebra reacted nice, and there was one hell of a blood trail for the first few miles. It started to Pieter out after that and we lost blood after what my PH told me was 18 kilometers through the Khomas Highland Mountains. We never did find that zebra. In hindsight I think it may have been a touch back and low although I know I hit at least 1 lung and really well at that because of the blood.
Philip and I both agreed if I’d been shooting a heavier bullet it may, and I stress may, have made the difference. It was also a fairly decent poke out there and way up hill so there are some other factors at play.
I just have learned over the years to shoot large animals with the largest bullet that my rifles will shoot accurately. I think it does make a difference in the field. Barnes IMHO, make the best hunting bullets on the market. I’ve never ever had a failure issue with them. They shoot well out all of my guns though oddly they seem to prefer a little bullet jump.
Most avid hunter/shooters can shoot nice pretty groups at the range off of sticks or the bench etc… those aren’t field conditions and in 99% of the cases it is on a flat or pseudo flat range. There is no stress and a clear open target. In the field, there is stress, elevation variance, brush in the way, and a billion other things working against you. I try to stack every advantage I can in my corner so I have 100 % confidence in my rifle and ammunition. Then if something screws up it’s on me and there are no excuses.
That’s just my 2 cents. I’m sure there are some that will both agree and disagree with me. I hunt for a living and it’s just a formula I’ve developed for the African and large heavy framed exotics.
Good luck and I hope you have a wonderful trip.