I bought a used Remington 700 in .300 WSM a while ago from a dealer, came with a Bushnell 6-24x50 on it (unsure of what model???). After maybe 10 rounds, the windage knob just fell off. I was reaching up to adjust, and felt space, then looked around, and on the floor next to my foot is the knob. As I don't have the original paperwork from it, what are my options? Is it worth sending back to be repaired? Looking to buy a .22-250 for my beginner's leap into coyote hunting, would be nice to not have to spend the money on a new scope too if I can avoid it. Thanks in advance.