One thing to consider with the .357 revolver.......all handguns are loud to the unprotected ear but IMO there isn't much that's more piercing than the crack of a .357 revolver. You might bleed to death from the ears before the guy you're shooting at hits the ground.

I have a Springfield XD.40 service and I saw it said here that if its too heavy you won't carry it.......they're right. I love mine and eats everything I throw in it but its a bear to carry so its stays primarily as a home defense weapon.

I was actually thinking of grabbing a Bersa Thunder .380 myself (I saw someone mention that one)
My best friend has one that he carries and it's a heck of a comfy gun, and I certainly wouldn't want to shot with one. Keep in mind that although some of these calibers seem light, .380 .38 etc chances are that if you ever need to use one of these in defense you will doing so at a distance of a few feet.......not some glorified movie set car to car, building to building shootout such as you MIGHT find in a law enforcement situation. You really IMO DON'T need something like a .357 or .45 or any of these heavy calibers for the in tight encounters you will realistically see in a carry situation. You need something you WILL carry, won't light you up with muzzle blast and that functions easily and reliably.

I know I won't feel underprotected one bit with a .380 in my waistband.