Well, looks like I forgot to clean the chamber of my Marlin 39 after shooting a few hundred shorts and then trying to shoot LR. The LR was a little reluctant to chamber and I had to push it out with a cleaning rod. So I now have ironed in **** in the chamber. I tried kroil and shooters choice on a brush wrapped with frontier .45 cleaning pad (chore boy) to no avail. Maybe if I let it soak in kroil for a week?