40 S&W Brass, 40 Smith & Wesson Brass, 40 Smith Brass, 40 Cal Brass, 40 Caliber Brass, 40S&W Brass

The .40 S&W is basically a short version of the 10mm Auto that utilizes the Small Pistol primer.  This cartridge quickly became a favorite among Law Enforcement, target shooters, and plinkers due to its combination of accuracy, power, low recoil and availability.