I recently purchased a new Marlin 336W in 30-30. I took this gun to the range for the first time on Sunday. During this visit to the range I was shooting Remington Express Core-Lokt 150 Grain soft points. I loaded six rounds in the tube and cycled the lever and fired the first round. When I attempted to fire the second round it did not go off. When I ejected it the primer had a very minor dent in it. I had the same trouble with all the remaining rounds in the gun. I put those same rounds back through the rifle and had mixed results. Two fired the first time, one fired after two attempts, and two took four attempts. I fired a total of thirty rounds during this session and the results were pretty consistent with the first batch. Only six fired on the first attempt and ten of them took at least four attempts. It appears to me that the firing pin does not always extend fully and strike the primer hard enough.