Our 9mm and 380 ACP cartridges features the NAS3 (Nickel Alloy Steel) casing from Shell Shock Technologies. These cases are 2x the strength of brass, handling pressures up to 65,000 psi, 1/2 the weight of brass, and eject cool to the touch. No burning yourself with a freshly fired round bouncing off the range walls and landing down your shirt here. These cases will not experience ballooning in an unsupported chamber after discharge. They can be reloaded with the specialized S3 dies; a fractionally larger flash hole eliminates back-face pressure, and they are magnetic for easy clean up both indoors and outdoors.