Check all the screws on your gun are snug. The main screw on the bottom side of the receiver just ahead of the lever could be loose. If so, this will definitely give you feeding problem. Otherwise, call Marlin. You may need to send the gun back in.

Have talked further w/my local gsmith, Cliff Labounty who is rechambering to Ackley, and Marlin. We are going to investigate to see if tubular and/or spring are rusty. If so we will polish tubular and/or replace spring. We may even polish carrier. Marlin says they sometimes have to bend carrier slightly. We will see......

Deke.

I had a feeding problem with my Marlin 336 CS in 35 Remington. It wouldn't do it all the time, and it would never happen unless I fired it. It would cycle cartridges all day long, but fire one, and more than likley it would jam.

With a fired round in the chamber, the carrier would try to lift the next round, but part of the third round would be out of the tube and lock the lever. I tried using Speer 220 grain bullets because they were a little longer, thinking that would prevent the third round from jamming the carrier. That didn't do it, and the rifle didn't shoot as well with that bullet either.

I decided just to not use a third round. Being a Single Shot Nut, I figured 2 rounds were plenty.

It was a great rifle, but I had to sell it because the ex-wife bought it for me, and didn't care for that reminder. How can I miss her if she won't go away???