The 165 TTSX is a great bullet, as any other monometal plastic-tip would be, whether a Hornady GMX or Nosler E-Tip.
The only reservation I have about monometal bullets is a few instances where they didn't expand the way they should. I'm not talking about losing petals (which in my experience makes no perceivable difference at all in killing power), but failure to expand to some degree, which naturally reduces tissue damage and hence killing power. Have never seen a 200 Partition fail to expand in 35+ years of using them, even on whitetail or pronghorn does, and never seen one fail to penetrate sufficiently even on angling shots through heavy bone on bull elk.
