I have a S&W 642 that I bought for my wife to have around the house when I'm on the road, I myself carry a Chiappa Rhino 200DS.
For a alloyed frame revolver with a 2" inch barrel, there is very little muzzle flip with .357mags due to the pistol design of firing from the 6 o'clock position. When I shoot .38spl +P it's like shooting a loud 22LR.
Here is a comparison chart between the S&W 640 and the Chiappa Rhino 200DS
http://i2.photobucket.com/albums/y6/...MASTER3D-1.jpg
As you can see the Rhino is a bit bulker then the Smith but overall dimensions are about the same. Advantage over the Smith is it does give you 1 extra round and like I said before very little muzzle flip even with magmum loads.

