Hey folks, I need some help from folks smarter and more experienced than me. I have a JC Higgins 583.1 bolt action 12 gauge. It's obviously old, maybe as early as 1946. The .1 tells me it's one of the earliest of these. To date I've just had to clean and oil it. Wear on the firing pin head cross pin where it contacts the sear caused it to not cock properly. Fixed all that by a full take down including the bolt. Now I'm having trouble getting the weapon to chamber properly. I can chamber a round by pushing it into place with my finger then closing the bolt but it wont slide in by itself. Also occasionally wont eject properly. The extractor on the left side sometimes doesn't fully engage so the one on the right makes the spent shell move a little sideways. I think thats pulling the bolt apart again and making sure theres no carbon gumming up the slot, spring and extractor. Cant for the life of me see what's going on with the carrier however. Alignment? (dont know why it would have changed as I didn't pull it apart) Pulling it apart and really cleaning the whole carrier assembly in my ultrasonic cleaner then oiling all of that? I don't want to take it down any further than I have to as parts are getting harder to find. Any help? Thanks in advance, Leo.