The 10mm Round – The History and Evolution
In 1983, the 10mm Auto was officially introduced alongside the Bren Ten, a semi-automatic pistol developed by Dornaus & Dixon. The Bren Ten was heavily inspired by the CZ-75 design and was intended to showcase the power of the 10mm Auto cartridge, one of the most versatile and powerful semi-automatic pistol rounds ever developed. The round was conceived in the late 1970s by legendary firearms expert Jeff Cooper. Cooper envisioned a semi-automatic handgun round that could deliver significantly more power and performance than the standard 9mm or .45 ACP.
The 10mm Round – The History and Evolution
One of the constants in the firearms world is the debate over which caliber is best. As that debate usually

The round is a popular backcountry protection option. The Danish Royal Navy Special Forces Long Range Patrol (Slaedepatruljen Sirius) carries the 10mm Glock 20 for protection against polar bears. According to reports they have had many successful stops on record.