FWIW,
I have two very different rifles. 1- Sako 75SS all factory. 1- Custom Tac-300, Lilja 24", Manners stock, etc. Both like the 150 TSX, using all the same components, both fairly consistent at .5moa at 200 yds.
Using the 150TTSX, I used the exact same load, using the exact same brass, not even changing the seating die, so same COAL but a different OAL.
Shoots to the same POI. Shoots almost exactly the same velocity as well, 3075FPS.
Shot to 500 yds this weekend on paper, and obviously not the same drops, based on BC, only about .7-.75moa, but I think that was me due to a lot of mirage. Sub milk jug to 700 yds very consistently.
I prefer the Bergers and have been historically happy with their terminal performance on 168's out of 7mm, but I am amazed how easy it is to get these TSX/TTSX's to shoot well and consistently. I figure I will have about 700yds to keep my velocity up around 2000fps+, as I'm hunting between 8000-10000'. I hope these will not let me down on Elk. My dad's carrying my Sako, limited to ~400yds, and I'm taking the custom.