The 10mm Auto round, often referred to as the “.40 super,”
was created by United States Marine Lieutenant Colonel Jeff Cooper. Cooper, who
died in 2006, was considered by many to be one of the best handgun handlers in
the world. His thought in designing the 10mm was to provide a happy medium
between the power of the .45 and the usability of the 9mm. He first created the
10mm in 1983 with the Bren Ten pistol. It was later implemented, though just
for a few years, by the FBI following the famed 1986 FBI Miami shootout.
The round has had a tumultuous history, with Bren Ten going
bankrupt in 1986 because their pistols never gained popularity due to their
cost. However, in 1987, Colt begin producing their Delta Elite pistol, which
was meant to be a m1911 style pistol, only chambered in 10mm auto. Then, in
1989, is when the FBI began using this caliber.
However, after only two years in use, the FBI changed to the
.40 s&w for many reasons, two of which being the massive amount of recoil
in the 10mm auto and the size of the gun needed to shoot the round. In fact,
many FBI agents simply couldn’t carry a gun chambered in 10mm auto because
their hands were too small. Though its use is rare, there are still many who
like to shoot the 10mm auto recreationally.
Each box contains 1,000+ once fired brass shell casings. This is unprocessed brass sourced from commercial shooting ranges. It has not been cleaned or resized and still contains the spent primer.
This brass contains different manufacturer's headstamps. It is recommended that all brass be inspected, prior to being reloaded and fired.