The Air Marshalls are issued the 125 gr. Speer Gold Dot "LP" (Limited Penetration) round.
Mythbusters "busted" this myth back in 2004. Annotated Mythbusters: Episode 10: Explosive Decompression, Frog Giggin', Rear Axle
A couple much better examples of so-called "novelty rounds" are the .25 NAA and the .300 Blackout.
I have done some .357 research and been contemplating buying a gun with that caliber but ammo is a deterient....
Ok, in both episode 10, and episode 38 mythbusters busted the myth that a bullet hole will cause explosive decompression.
"The pressure is not high enough and the hole is too small. Explosive decompression only occurred when a hole the size of a window was made with explosives. Even then, the rush of air could not suck Buster completely out of the hole. Lastly, there are proven instances of explosive decompression where the plane was still able to maintain control and land." -mythbusterresults.com
I bet all the Air Marshalls watched that mythbusters episode and were a little bit happier afterwords.
I have seen that the .357 sig is cheaper in areas hat have LE agencies that use that caliber. I am currently in NC and i can go to either one of he 2 walmarts i have in the area and purchase .357 sig ammo, albeit more expensive. It is available i believe because the NC highway patrol carries it. Same as i have noticed in pa, goes for the .45 gap. PA state police carry that and it is readily available at many stores.
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you can't get these at the novelty store. BTW, I don't consider the .357 SIG to be a .357 anything...but rather a 9mm Magnum which is what it really is.
I have a spare 357Sig barrel for my M&P40. 40's cheaper and a little less snappy. For the slight differences in the rounds...I'm personally happy with .40. If 357Sig was the first one to the table, this thread would probably be about the .40
My brother has a Sig in 357 Sig and I gave him a barrel for 40S&W last Christmas, guess what he shoots in it now, 40S&W cause he can buy it and the range has it reloaded for cheap. They are always out of 357SIG!!!!