The creation of the .357 magnum round in the 1930s has been
attributed to three different men; Elmer Keith, Philip Sharpe, and D. B.
Wesson. Created to be a revolver round, there was one driving force behind its
creation; penetration. When the prohibition laws we put in place in the 1920s,
bootleggers begin to find ways to out-smart law enforcement. It wasn’t long
before they began using armor plating and vests in an effort to become
bulletproof. Their thinking; if the round can’t get to them, they can’t be stopped.
After intense testing, it was discovered that a round
travelling any slower than 1000 feet per second was useless against this armor.
Thus, many rounds of the day were not effective. In fact, the only one before
the .357 magnum that could penetrate the armor was the .38 Super Automatic by
Colt. In fact, the .357 magnum was birthed by experimenting with different load
sizes inside of a .38 super casing.
Through-out the early 1930s, Keith, Sharpe, and Wesson
experimented with several load sizes and projectiles. It was soon discovered
that, though you could chamber a .357 magnum in a gun designed for a .38 super
round, it was not safe considering the drastic rise in power. Hence why the
.357 magnum casing is only 1/8 an inch longer. Nowadays, the .357 magnum is
popular as a back-up weapon for many hunters and outdoorsman due to its ability
to bring down big game.
Headstamps are mixed. This is unprocessed brass sourced from commercial shooting ranges. The casings have been washed, but not resized and may still contain the spent primer.
It is recommended that all brass be inspected prior to being reloaded and fired.