I recently purchased an Ithaca 900 in perfect condition. A friend of mine won this gun in a raffle back in the 70's and used it one time to rabbit hunt. It is 20 ga. 28 in. with vent rib gold trigger and gold inlay. I think it is recoil model because I can't find adjustment screw for gas setting.I don't have an owners manual and can't find one on internet. My question is how to remove shells from magazine without fireing shotgun. It feeds shells to chamber when shooting but not manualy