The HPBT GK is tougher than the 165-gr SPBT. They both shoot to the same place with the same load. So you have a bullet for soft skinned antelope and one for the big stuff, like Oryx and eland. Barnes 165-gr TSX, Nosler Accubond and Swift Scirocco offer flat trajectory and even higher weight retention, if you are worried about that. But the GK has killed a train load of big game.