Re: What .40 S&W round does LE Officers use?
I've sold it all to different departments. Some stick with Hydra-Shok, most are happy with HST, some want Golden Sabre's, others will only consider Gold Dots, others still won't touch anything but Ranger T's.
It's all bullshit.
None are magic, most will do what you need.
Everyone has a pet round they like... but it all mean very little in the end. They all work when your shot placement is sufficient, none work when it isn't.
HST, Gold Dots, Ranger T's... I'd buy what's on sale, what you can find in steady supply, and what runs well in your gun. For me that's 9mm 147gr HST. It used to be 124gr Gold Dots. I won't carry CorBon, Hornady TAP, or HydraShok, but most of the rest are all just fine.
Shoot your own preferred round in quantity, and at night to make sure the flash isn't overwhelming from your own carry gun, and then stop worrying about what's "best".