The .357 SIG pistol cartridge is the product of Swiss firearms manufacturer SIG-Sauer, in cooperation with the American ammunition manufacturer Federal Cartridge. While it is based on a .40 S&W case necked down to accept 9 mm bullets, the .357 SIG brass is longer. With a good hollow point bullet, the .357 SIG penetrates well and has sufficient energy transfer to incapacitate living targets through hydrostatic shock. Like the 10 mm Auto, the .357 SIG can be down-loaded to reduce recoil, to the point where recoil is similar to that of a 9x19mm Parabellum. However, since the .357 SIG uses bullets that are generally the same as those used in the 9 mm Para, downloading it to this point would defeat the purpose of having the SIG cartridge in the first place, as recoil and ballistics would be identical to the less-powerful 9 mm cartridge. Because the .357 SIG fires at relatively high pressures, muzzle flash and noise are significant with standard loads, even with longer barrels. Utilizing loads with specialized powders and experimenting with different bullet weights can reduce flash. Like the 7.62x25mm Tokarev, the .357 SIG works well when shooting through barriers. There has been a documented case in Texas where a police officer's .45 round did not penetrate a tractor-trailer's shell, but a .357 SIG round from a backup officer's gun did, killing the suspect inside. The round's ability to penetrate barriers is the main reason for its adoption by law enforcement agencies. However, other documented police shootings have confirmed the round's ability to not overpenetrate the body, even though ballistic gelatin shows 16 inches of penetration through heavy clothing. The Virginia State Police have had several documented officer-related shootings involving the .357 SIG, and in every case, not only were the suspects stopped instantly with one shot (except one who was shot several times while attempting to murder an officer), the bullet either did not exit the suspect, or was stopped in the clothing upon exiting, proving that even at such high velocities, the round when used with adequate expanding hollowpoints will not over penetrate soft tissue. The same department has also reported that attacking dogs have been stopped dead in their tracks by a single shot, whereas the former subsonic 147 grain 9 mm duty rounds would require multiple shots to incapacitate the animals. The energy available in the .357 SIG is sufficient for imparting hydrostatic shock with well designed bullets. Recent publication of human autopsy results has demonstrated brain hemorrhaging from fatal hits to the chest with .357 SIG bullets. The SIG-Sauer P229 in .357 SIG is currently one of the standard issue firearms carried by special agents and Uniformed Division officers of the United States Secret Service, the Bastrop County Texas Sheriff's Office, the North Carolina State Highway Patrol, Delaware State Police, Rhode Island State Police, Alameda County Sheriff's Office, Virginia State Police, Federal Air Marshals and the Treasury Inspector General for Tax Administration. [READ THE REST OF THIS ARTICLE]
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