Sounds like rough chamber surface. You can use some 0000 steel wool on a Fordum and polish the chamber a little and see if that helps, it should. If the ammo were giving high chamber pressure the empties would get progressively harder to extract but that is not the case of this rifle. Has this chamber always done this since new or is this something that has recently developed. Has the barrel been rechambered from a different cartridge such as recut to Ackly Improved? If so, maybe the chamber cutter left some machining chatter or roughness on the walls. Good luck, hope you can get this worked out without rebarreling the rifle. BTW, if the barrel is in good shape you can always have a smith set the barrel back and recut the chamber, this would be a lot less expensive than a new barrel.