Recently, I purchased a Marlin 336C 30-30 lever action rifle. I put two cartriges into the magazine chamber and the gun jammed when I tried to work the lever. The lever locked in the open position and would not close. This left me with a locked up gun with live rounds in the gun. I had to disassemble the lever remove the bolt to free up the rounds. The gun worked for a couple after this reassembly for a couple of rounds and then locked up once again. I returned the gun and exchanged it for another new gun. I purchased two Snap Caps and tried to process the rounds through the action. Once again the gun jammed with a locked up lever. I had to disassemble the lever and bolt to free up the snap caps. I returned the gun to the merchant once more and received a refund. When I called Marlin about the difficulty they suggested that the loading gate which never repositioned properly in either gun might be the problem. I really like the lever action guns made by Marlin, but I am leary about repurchasing another one. Has this happened to anyone else? What did you do about the problem?