Kent imports and distributes the "Gamebore" Traditional Game 65MM length shells from Britain. You should be able to order them from any dealer who handles the more common Kent Faststeel shells. You will need to order a flat of 10 boxes. They are good shells. No disrespect to Sapper33, but all the Remington ( and all other North American brands) 16 ga shells are 2-3/4" ( 70mm) length and not suitable for your gun. Several European makers like S&B still load 65MM 16 ga. shells, but Gamebore is by far the most common here. Hope that helps.