Apparently you don't have much experience with any other so-called "premium" bullets than TTSXs. They're great bullets--Eileen and I have killed some game every year since they appeared--but I have used a bunch of other bullets that penetrate more than sufficiently on big game from 100-pound animals like pronghorn to 800-1500 pound animals from elk to moose and buffalo. But have shot lengthwise through pronghorn bucks with 120-grain 6.5mm Nosler Ballistic Tips. Won't mention the cartridge because too many here would throw a schidt-fit.
Might also mention that I started using Nosler Partitions back when they were still lathe-turned. The two I first used (because I had so few rifles back then) were the 130-grain .270 and 200-grain Partition. Never recovered any, on game up through elk.
“Montana seems to me to be what a small boy would think Texas is like from hearing Texans.” John Steinbeck
