Some time ago I saw a pic of a curious device for quick loading of double guns. Used at Brit style driven shoot, if my memory doesn't fail. It looked like a portmanteau type bag, to be carried on one's belly, it folded in for carry and folded out at ready-to-load position. Inside, there were nests for shells, located by two, so that it looked easy to grab two shells at a time and drop them into the barrels. Hope you can visualize it from my description. Does anyone recognize this thing?

Russian Hunting Shotguns