OK, keeping my fingers crossed, but I might have solved the shell feeding problem, so I thought I'd post up what I did in case anyone else had this issue. I took the cartridge latch assembly out and inspected it closely.(it is the thing that stops the shells from coming out of the magazine) It has a button, body, latch and spring. The body is stamped stainless steel, and mine looked a wee bit warped. I looked for wear spots, and decided that the latch was not getting out far enough to successfully catch the second shell coming out of the mag because of the minute warp in the body. I filed it down a bit, and reassembled it. I field tested it once, and it worked. I haven't had a chance to run a lot of shells through it, but it seemed to work for the first time in many years.
trapped in the polar vortex