Since its introduction in 1983 in the star-crossed, CZ-75-inspired Bren Ten, the 10mm Auto cartridge has followed an all-too-familiar trajectory curve in terms of popularity. It has gone from “The Next Big Thing” to cult status, having been pushed along the way by the almost-unprecedented acceptance of the .40 S&W.
However, the 10mm Auto is still considerably more potent than the .40 S&W. And chambered in the Glock 20, it represents about the upper limits of ballistic potential you’re going to get in any real-world auto pistol.
In 1983, the 10 mm semi-auto pistol cartridge made its debut. Developed by Jeff Cooper as a more powerful man stopper, the new cartridge was originally paired with the "Bren 10" pistol designed by Michael Dixon and Thomas Dornaus. Both the cartridge and the handgun generated plenty of excitement in the shooting community at the time. Unfortunately, the Bren 10 ran into production problems that limited it to a small 1,500 unit run of between 1983 to 1986. Despite the failure of the first pistol chambered for the potent 10 mm, the enthusiasm for the cartridge was still strong enough to induce Glock to step in and develop a shooting solution based on its pistol design.
Many devout fans of the 10mm love their Glock 20, myself included. So when I heard the Generation 4 version was released, I jumped at the chance to pick one up. I really like the Gen 4 grip on my other Glocks and I thought it would be especially helpful with the recoil of some hot 10mm rounds. Turns out I was right.
I ordered the gun the day it came out and had it in my paws the next day. I cleaned it, lubricated it to specs, turned the rear sight around (I don't like the Glock sight picture), and patiently waited for the weekend to put some rounds through the beast.