Early 10mm Experiments #gunsdaily

While you may think of the 10mm Auto as being a cartridge, from the 80's, the development of .40 caliber rounds in the same vein as the 10mm Auto and the .40 S&W dates back much further than you might think.

See the full video on Rumble -https://rumble.com/v6upkrz-10mm-auto-vs-.40-s-and-w-the-brother-war-the-dead-calibers-archive.html?e9s=src_v1_ucp