From Chuck Hawks: "I advise all experienced revolver men to carry the legendary Federal C357B...There is one caveat, however. The C357B and other full-power .357 Magnums have a lot of blast and kick...This was found to be the top load in Marshall and Sanow's famous stopping power research project, with something like a 96-97% one shot stop record. This load is effective out to at least 100 yards from revolver or rifle."
These are very loud, violent loads. Still images show small revolvers "in a fireball" when you touch one off. The Federal C357B load hurts my wrist when fired out of my SP101. My 686 6" is a hand cannon with this load.