I think I would try to pair the 120 TTSX with the 120 Nosler BT and use the BT for work up, practice, and deer and TTSX if anything bigger is on the agenda. I am doing this now in the 7RM and the 120 BT can stand up to all the velocity I can get so far. They shoot close enough to be interchangeable, I can hold an inch to 1&1/2 inch with a mixed magazine of these two. Either by themselves shoot in the .5-1 MOA range.
Both those bullets are quite popular in the 08’ if they shoot I wouldn’t have any qualms running them. I did load the 120 TSX in the 7mm just for something to do , never did use them on any game .