Has anyone been tracking the development and progress of the .224 BOZ cartridge? Invented by Civil Defence Supply, this intriguing number is based on a necked down 10mm auto shell casing. This is clearly a strong foundation. Bullets in the popular .224 caliber are available in ample variety. These design elements, obviously, did not materialize by accident. Primarily a handgun and smg round, the .224 BOZ emerges from the muzzle at 1800 fps and higher. Some details are available at: http://www.civil-defence.org/products/ballistics/ballistics.html and http://www.securityarms.com/20010315/galleryfiles/1800/1823.htm. It would appear that the .224 BOZ would be an ideal candidate for fairly simple barrel swap conversions with existing 10mm pistols. If this cartridge catches on, it would bring an exciting new dimension to handgun performance. This could be one of the key ammo innovations to watch. Hopefully, some of the better handgun manufacturers will grab onto this hot item and run with it.