My four ammo choices were: Remington Golden Sabre 185-grain Brass Jacketed Hollow Point, Winchester 230-grain Full-Metal Jacket Practice Rounds, Federal Premium Hydra-Shok 165-gr Low-Recoil Jacketed Hollow Point, and Hornady Zombie Max 185-grain Z-MAX. (I couldn't resist that Zombie ammo, but I don't recommend you carry it in any duty or self-defense gun. It could be a problem in court.)
I set my target at 15 yards. This is what I would consider the high average distance of most police shootings and where accuracy would be paramount. I shot five five-round groups, unsupported, with no time limit. I then shot the same groups from a supported position, similar to lying prone over the hood of a patrol vehicle. At the end I mixed up the variety of rounds and shot them at a rapid pace to check cycling reliability. As I suspected there were no issues here.
Checking my groups I was able to keep almost all of them under two inches, with the occasional flyer here and there, which I attribute to the monkey, not the machine. Considering the 30S is a subcompact designed primarily as a back-up combat weapon and not a competition gun, I was pretty impressed. Glock's barrels have always been known for their accuracy and this was no exception.
My next test was to put the 30S to work as it was intended, as a concealed back-up gun. I have a simple Kydex holster that rides inside my waistband and the 30S was able to snap into it nicely. I carried it around for a few days in this configuration and was pleasantly surprised at how manageable it was. My usual concealed-carry pistol is a subcompact and very slim 9mm so the 30S was a big step up in size. After a couple of days of having it follow me to the grocery store, post office, and gym, I was convinced this was a gun I could see myself carrying all the time. A .45 ACP that holds 10 rounds you can carry concealed all the time and not drive you crazy? Yeah, it surprised me, too.
The Big Questions