I have not tried the TTSX bullets, but I certainly have been impressed with the X and TSX bullets...
I've used them for moose, caribou and whitetails in my 9.3 x 62 ( 250 grain) and for deer in my 7MM08 ( 120 grain) for the last ten years or so... Most of my animals have dropped on the spot and none have gone far.. In my experience, they kill just as quickly and leave less bloodshot meat than cup and core bullets...They have always expanded for me, but not excessively...Most of the time they leave a half dollar sized exit hole...