Hi guys... I am brand new here. I just inherited a Marlin model 1892, produced in 1895 according to its serial number. Was probably my great grandfather's who had a ranch in Central Calif. back in the day. Anyway, here's the problem ---- if i load more than one shall in the magazine tube and work the lever, ALL the shells come zipping into the chamber, jamming the gun. If I load just ONE shell in the tube, everything works fine: the bullet loads and ejects like it should. The firing pin is broken, which is an easy fix. I don't think the broken pin is causing the problem. I'm attaching a pic, which looks just like some I've seen in the NRA museum website. I don't think there are any missing parts. So, why is this happening? Any insight would be appreciated. Thanks!