I own 2 Marlins, a 336 and and the 1895 and both have fairly slick actions. First thing I would suspect is if you are shooting handloads that they are possibly too long. If that is not the case then I would remove the lever and bolt and ejector clip and give the inside of the receiver a good cleaning and reassemble. If you still have the same problem after checking these 2 scenerios then I would suggest sending the rifle back to Marlin to look over.