Howdy. I am pretty new to TFL and this is my first post in the Smithy forum. My Marlin 336 in .30-30 (two years old, just under 100 rounds through it) has broken its rear band screw twice. Both times, the screw sheared in half along a diagonal line in the screw's shank. What is going on here? I may send it back to the factory but would really rather not. I could of course buy another screw, but since the same thing happened twice, I have to wonder if there is not a larger problem here. Any help would be appreciated.