I was recently gifted a Marlin Model 60 .22 Long Rifle from my grandfather. This thing is old, but shoots well. The only problem I'm having is that, under certain conditions, the rifle jams. The rifle has a tubular magazine, and it fires fine for the first 5 or so rounds. However, once I get down to around 10 rounds almost every shot the gun jams. I'm not sure if this is a problem with the spring in the tubular magazine, as I've been told, or a more serious issue. I just thought I'd get a second opinion. Thanks all!