I have an older Remington 870 Express (pre Express Rollmarks). Sometimes the shells hang up before they chamber, I have to force the action forward to get it into battery. Before we go any further, let me explain everything I've done so far...
updated the Extractor/spring
updated the carrier latch spring to the black 1187 model
removed the tube detents
added a W/C 1 shot extension
replaced the barrel with a 20in smooth bore with rifle sights
replaced the stocks with Speed Feed stocks
I have tried three different barrels, including one from a Wingmaster that does not have this issue. I think I've narrowed it down to the actual carrier being out of spec. I haven't switched the carrier yet as I don't have another with the flexi tab system, I'm not sure if the one off my old Wingmaster will fit.
Has anyone else experienced a problem like this? if so, how did you resolve it>