seeing that you are running a 9mm you must be shooting your wife or daughters gun huh , becuase 9's are for bitches !!
(just jerking your chain brother)
I haven't gotten to do any ballistic media testing with the HST's yet but I'm hearing good stuff on their stopping abilities.
I typically run Cor-Bon 185-200g +p though my 45 it's a good balance of speed and sectional density for expansion and penitration and the opening initiates rapid expansion even though thick clothing.
for a civilian defense round i still like the Glazer and Mag Safe pre frag rounds , their expansion is instant couple with decient penitration but little to no change of a pass though and the ricochet risk is cut WAY WAY back.
the most important thing if finding a round your weapon eats reliably and you can shoot accurately , I'd rather see sombody shooting a 380 with a ball round which they can make accurate hits with than sombody shooting a hot 10mm with the newest super wiz bang hyper killer slugs that they can't hit shit with !!
I'll take 3 slow weak hits over 20 fast misses all damn day
(the 9mm statement was simply a poor attempt to screw with TC , please please please , do not take that as a cut down on that caliber !! a well fed 9 is more than enough gun for ANYBODY , I've trusted my life to one more than any other pistol round with zero regrets)