Remington 1100 20 gauge problem
I picked up a basically new Older Remington 20 gauge 1100 3" mag from an estate sale a few weeks ago. Gun is spotless and appeared unfired had been sitting in a gun cabinet since 1979. It was very sticky with a very old coating of oil. I took it apart and soaked it in solvent for a few hours and everything went back together great. But the gun isn't cycling shells. I have had several 1100's and never had this problem before what could be causing it?
I replaced the gas seals when putting it back together and made sure the gas port was open.
I fired about 15 2-3/4" rd's through it and only had it cycle once
I am stumped any ideas before I bring it to a smith?