I was just fooling around with some different techniques where I could put some added downward and rearward pressure on the rifle.
Basically I just formed a loop to fit the crook of my arm, hooked my arm through it, then business as usual, using the non-shooting hand to manipulate a bean bag used for rear support.
I was thinking about how shooting with a sling from prone really prevents "hop", and seeing if there was a practical technique to reduce hop from a bipod, using the sling.
