The problem with using a revolver to pistol-whip is the potential for frame damage and barrel misalignment.

That's why a qualified pistol-whipper would only use the grip or butt of the pistol--the 'handle' for you laymen or apprentice whippers out there.

Resin-based pistols are ok depending on the ambient and operating temperatures. For instance, I wouldn't use a Glock if I was in Alaska.

Better to stick to something like a .357 and use the butt. Just don't keep a round under the hammer to be on the safe side, or go old skool and use a Navy or Army Colt with the nice, heavy brass frame. A m1911 is also good due to its weight.