When you watch the section of the TT video I referenced, my observation is a pretty simple one, really. If you're using your right hand in a whipping motion you aren't using #4 PA.
The swingers Rope Handle action is preformed by the right arm - like TT said "whip it and zip it (with your right hand)". With both hands on the handle of a whip, can you blast your left arm off your chest while snapping the whip on an inclined plane? You could put your eye out that way, I'll tell you!
It's still not a #1 PA hitting action, though, so I guess it's really a 2-barrel?