For .32 h&r magnum there are some interesting defensive loads out there currently.
DoubleTap has a 60gr lead free and 120gr hard cast loading.
Buffalo bore has a 100gr jhp, and a 130gr hard cast loading.
Hornady has a 80gr ftx as well.
For general plinking in .32 h&r magnum the best I can find are
Wisconsin cartridge 100gr jhp at $45 for 50, and Ventura Munitions 100 gr SWC at $54.99 for 50.
Regarding the Federal HST round being the best self defense round available for .327 currently? Well that does seem to be the case. I cannot find anything else currently produced that has ballistics as all around desirable for SD as that round. Every other round I am aware of either way over penetrates, or doesn't expand as nicely out of a 2" snubbie.
Lucky gunner has some good supplementary testing results for both calibers, as does the YouTube channels Tools&Targets, and AmmoMart.
Finally, IMHO .32 h&r magnum is the finest self defense round that has been slept on by the general public. I love sharing it with my 9mm and .380 focused friends simply because most of them have only experienced what they shoot, plus .22lr and maybe .357. It's nice to open them up to the potential of a cartridge between .380 and 9mm because not everyone is happy with those two.