I carry Remington 125 grain Golden Sabers in my 640-3. They are a "mid range" .357 load, advertised velocity is 1220 FPS (don't know the tested barrel length). In my 640 they are accurate and controllable. I checked my records and for some reason have yet to chrono this load from and of my snubbies. I'll have to correct that soon.

The Buffalo Bore .38 special +P 158 grain LSWC HP is nothing to sneeze at either. That load clocked an average of 1003 FPS out of my 640. I'm using this as my carry load in my 340 M&P.