Ya an enclosed loop is hard to get the shell out fast. They are good for hunting, transporting and such. The guy in the video uses a open clip so they pull out the front. I have a mole dump pouch with a lose draw sting closing top that I think would work well for a shell bag as well. I have it on a chest rig so I don’t need a separate piece of gear. If i have an other defender for the shotgun I can give then the regular shell bag.
CONDOR Digital ACU MOLLE PALS Roll Up 5.56 .223 Mag Magazine Dump Pouch Holster
This shell bag has a deep pocket so it will keep them from bouncing out. Some are shallower than others.