Finally have the gun in hand. I tried a .219 Zipper case and .22 Hi Power and neither fit. I will see if Buffalo Arms will send me a couple of .219 Donaldson Wasp which is a possibility. Buffalo Arms doesn't load the Ackley Improved. I would borrow a .219 Donaldson Wasp or the mentioned Ackley Improved from "one of us" if it were offered.