If you don't already know, In the minds of most gun "experts" the .32ACP has a problem with factory Hollow Point ammo expandinding a bit too much and under penetration.
Granted these opinions are based off the FBI minimum standard (of 12") which a bit steep for a "pocket gun" to attain but still a lot of factory .32ACP ammo won't reach or barley reaches 10" in a calibrated bare gelatin test.
All the 60gr JHP and the 65gr hydra shock seem to do about the same penetration and expansion wise with the exception of the Fioochi 60gr SJHP which has no expansion what so ever. Likewise the 71gr Mag Tec JHP won't expand either.
Some folks like to put a drop or 2 of super glue in the hollow cavity of the lighter 60/65gr bullets to delay expansion and it seems to work pretty well giving them about 1/2" more penetration.
I'd like to point you to a member here on THR that has documented quite a bit of his own testing wit the .32ACP. His results mirror what I have been able to find else where from variouse sources on the net.
http://www.brassfetcher.com/index_files/Page921.htm
Since all the lighter bullets seem to perform about the same, I personally carry the Hornady 60gr XTP in my primary mag (as it is readily availiable/reasonably priced in my area) and I have a back up mag fillled with Fiocchi 71gr FMJ.
I really really like my little .32 Guardian. I hope that I never, ever have to use it, but I know if the time comes, my skill will likely matter FAR MORE than the ammo I am carrying.
Will