Underwood XTREME Defender 357 Sig 115 Grain 20 Rounds

Introduced in 1994, the 357 SIG is a rimless cartridge for semiautomatic handguns created by necking down the 40 S&W case to take a 9mm (.355-inch). Gains in velocity--and thus penetration--without dramatic increase in recoil are significant, with a 115-grain bullet at 1500 feet per second and a 125-grain bullet at 1350 fps. The 357 SIG has been adopted by some law enforcement agencies, but has not yet become a popular sporting cartridge. It is available from most major handgun ammunition manufacturers. — Craig Boddington

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