I've got a Sig 229 that was originally 357SIG that I bought a .40 S&W barrel for.
In my experience with it, the 357SIG has much more muzzle blast but has less recoil, making it more controllable, but more intimidating.
While the .40 doesn't have the flash and blast, it kicks harder, making it slower for a second shot.
This was confirmed by others who have fired mine.
Fot these reasons, I keep it loaded in .40 caliber inside the house, just in case I need to fire it at night in a relatively confined area.
If I was to carry it, it would be in the 357 configuration.
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