IMHO, I think it has less to do with the petals on the TSX and more to do with the blunt, rounded face of a lead-core bullet. When it reaches the hide on the far side, it often doesn't have the energy to drive through given its shape. If I had to pick a bullet for Buffalo that would do the trick but likely stop under the hide on the far side, I'd go with either a 260 or 300 grain Partition -- the latter loaded down somewhat.
Having said that, and given the phenomenal results I've had with the 270 TSX on my one-and-only Namibia hunt, you'd have to specifically tell me that I couldn't hunt with that bullet!
