I have a 870 Police Magnum. Yesterday, I shot some old Winchester 4 shot that I found around my Grandfather's house. They would barely eject out of the receiver. The spent shells literally dropped right next to me. I've never noticed this before with OO Buck or Rifled Slugs. Has anyone experienced this. I keep the chamber mirror clean after every use. I also checked the extractor on the bolt and it seemed fine. The spring was still putting pressure on it. Also the ejector seemed ok and not broken.