Personally what i have seen with bergers on game at long range is the reason why i wont use them. I have seen a whitetail sustain 6 shots with none of them showing much sign of expansion, actually the first couple preformed just like a FMJ. This was at 500-600yds, same results on pdogs around 1100yds. Now this was with a 6mm at very low velocity. In a 7mm i think you will experince better results. Personnaly for long range game bullets I prefer polymer tipped bullets and the new aluminum tipped wildcats, they just ensure better expansions. I dont have much experince with the barnes bullets but they will penetrate like a SOB and as long as they open up they should do plenty of damage. I also hear the TSX dont have all the prob's the X bullet used too.
take it easy
steve