You likely have never used a TSX on game and haven't looked a ballistic chart either
168 gr TSX at 3200 fps 250 yard zero
-13.0 inches at 400 yards, velocity 2394 energy 2137
200 gr partition 2850 fps 250 yard zero
-16.9 at 400, velocity 2101, energy 1960
I have used partitions on game before and respect them as bullets, but they just ARE NOT better than the current monolithic hollowpoints. More velocity, less drop, less winddrift, less recoil, same killing power and ability.
You should try a one on your next moose.
Well......
I regularly shoot long distances (well beyond normal hunting point and shoot ranges) that requires my understanding of a bullets trajectory as well as my ability to compensate and adjust for for field conditions....The Barnes reloading manual is often a short range dreamy version of what really happens.
I normally use Exbal, but for simplicity this is from JBM Online.
(Simplified for obvious reasons.)
168TSX BT
3200FPS
250 Yards Zero
Range Drop Windage Velocity Energy
(yd) (yd) (in) (fps) (ft.Lbs)
400 13.7 12.3 2285.9 1948.8
200Partition
2980FPS
250 Yards Zero
Range Drop Windage Velocity Energy
(yd) (yd) (in) (fps) (ft.Lbs)
400 14.9 10.6 2259.7 2267.3
I have used X bullets in 270, 284, 308, 338, .375, .416, and .458 since they were first introduced in the '80's....long before they were popular (ya know...
X - FAN).

I have also used the relatively new TSX in 308 150gr and 180gr as well as numerous larger bores.
While I have not used the 168 on game I assume the bullet performs the same as the 150 and 180 (that is there is no difference between them)? The TSX is a great bullet and is my bullet of choice in most other calibers (including the 30-06).
I have also killed game with a few different 30cal Nos partitions and over the years have come to prefer the 200 Partition above the smaller Partitions.
I also feel it disrupts more tissue than the 30 cal TSX's and acts very much like a 338 Win does on moose sized game.