i believe my problem was in the barrel...i think the spent rounds were jamming up in barrel and when the forearm was pulled back the extractor was grabbing the round but couldnt pull it out so the forearm would not move i tried several different ammos, cheap ones, good ones, high brass, slugs, everything.....it did it on every type of ammo.... and remington "reamed and polished the chamber" when i sent it in for warranty work and when i got it back it was even worse...i told the people at gander i was tired of messing with it and asked if they would exchange it, they said yes, so when i did the exchange i asked if they would let me upgrade and they did mine was an 870 express field gun...26" barrel, black synthetic...cheap model 870