My 640 Pro Series is one of my favorite handguns. I carry it quite often when in plain clothes. Secure in its holster yet quick into action with it's short barrel and relatively light weight with the power of the 357 Magnum cartridge. Very quick from under a suit coat or vest. Even faster when fired at close range from inside a jacket pocket. That speed is the Lightening and 357 Mag is the Thunder. The moon clips must be heaven sent. An appropriate weapon for a holy warrior as it turns others into holey warriors.