There are similar devices to shoot rescue lines out of shotguns
I'm well aware of these and they were quite common whenever we replenished at sea. The Tankers, Ammo ships as well as stores, would fire a line, between our stacks, prior to tranfer. I could see that they used shothguns and we would always try to "procure" their nylon braided shot-line. ..
We seldom got away with it. .....
Be Safe !!!