Of the Big 3 bullets (the HST, the Gold Dot and the Ranger T), the HST is the best of both worlds. It has massive expansion like the Ranger T, but also stays together like a bonded bullet (the Gold Dot and the Ranger Bonded).
Check our the round. It was good enough that I moved heaven and earth to get a couple boxes over here in Kenya. Before that I was using the Ranger Bonded 147gr (not a bad round, and is the one the FBI uses and is the same as the PDX1) and before that the 124gr Hydrashok (which has plugging problems in heavy clothing, but I don't have to worry about winter clothing here). The HST is just perfect, and the only thing that MAY compete with it is the all copper DPX.
Good luck.
The 9mm Federal 147 HSTs looked very good in this test.
I believe the HST to be the best round.
I have been reading its reviews and comparisons ever since it was released. It has consistently, over many years, performed as the best round in every caliber.