.357 Sig is noticeably pricier than 9mm or .40, being about on par with or slightly higher than .45 ACP. It's definitely easier to find than something like 10mm, and there always seems to be at least one online supplier who has a good amount of it in stock. But with only a handful of american agencies using it, it's always gonna be harder to find than the big 3.
Personally I love it. Shoots like a laser, very accurate with an ultra flat trajectory, and if the dirt clods flying off the backstop are any indication, it hits like a freight train. Recoil has some snap to it, but it's not as bad as a .40. The bottleneck cartridge design almost eliminates malfunctions with feed and extraction. I think it's probably the best autopistol cartridge available today.
But the 9mm has been around over 100 years and is good enough, so why change? That's all there is to it.
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I just went a bought quality 9mm drop in conversion barrel for my G31, so I can just shoot both. Wanna shoot .40? Just get a factory G22 barrel, it'll drop right in as well - .40 and .357 mags are completely interchangeable.



























