The .357 Sig is a 9mm projectile, loaded into a necked down .40 S&W casing.
No. .357 Sig and 9mm are two completely different calibers and not interchageable.
No. Some .40/.357 Sig pistols can be converted to fire 9mm simply by dropping in a 9mm barrel and using the 9mm magazines, though. Not sure about the Glock.
9mm will have the least kick, follwed by the 40, then the 357.
This seems to be a persistent myth. The .40 S&W/.357 Sig magazines are not compatible with 9mm Glocks.
100-400 or so
Submachine gun rated 9mm
No. Standard ammunition in the correct caliber for the gun. However, ONE of those calibers is the .357 SIG auto, and other .357 cartridges do not interchange with that.
No. The .357 SIG is a bottlenecked cartridge. It is fatter and longer than the 9mm Parabellum. ALSO, please note that many auto pistol cartridges headspace on the case mouth, and are VERY sensitive to length differences.
I am trying to make a deal with a coworker who says his 4006 came as a dual caliber gun .40 cal and .357 mag. I know the gun cannot be .357 mag so it must be a .357 sig. I have not yet seen the .357 barrel. I do know that Bar-Sto makes a .357 sig barrel as I just read the article on reloading .357 sig. Search google for 4006*.357 sig.
The answer is yes....and no. By performing a barrel swap to the 357 sig barrel the gun is capable of shooting the 357 sig round. However, the 357 sig has a much higher barrel pressure (5000-10000 more psi). While the gun can shoot the 357 sig round simply by changing the barrel, this will cause more wear than is normal and can possible damage the slide. The safe bet is to buy a slide and barrel meant for the 357 sig round.
DO NOT ATTEMPT THIS!!. Never fire ammunition in a weapon that it is not chambered for.