Model70Guy,
Yep, as you say, "A high shoulder will drop game in a heap, but the TTSX is far from the only bullet that will do that."
I've seen it and done it with a bunch of bullets, including (gasp!) the dreaded Bergers, and even Federal "blue box" and Remington Core-Lokt factory ammo. My wife did it, very deliberately, with the heaviest-bodied Montana whitetail buck she's ever taken, using a .243 Winchester and a 100-grain Nosler Partition at a measly 2900 fps. The lousy Partition even went through both shoulders and the spine--and exited.
