I'm almost out of 168 TSXs for my .30-06. I'm going to try the 130 TTSX and 150 TTSX and see which shoots better in my gun. I'm not at all worried about penetration with the lighter bullet. The base will drive through even if you lose petals. With the TTSX needing a higher velocity to open than the TSX, I'm not worried about losing petals. Just go with whichever shoots better.