Hello everyone. A while ago I inherited a Ruger M77 Heavy Barrel in .308. The rifle had not be shot for decades and looks minty new. I understand that some of these rifles had issues shooting well depending on the barrel manufacturer. The original owner barely shot it and it was so long ago he remembers very little about how it shot. I contacted Ruger with the serial number and they said it was a contractor barrel. Because I am still new to shooting with magnified optics (at any considerable range) I am wondering if it would be worth my time seeing how it handles. I wouldn't be able to tell if I am just a poor shot with it or if the rifle has a defect. Can any of the members share some of their knowledge about these rifles and the likelihood that I have one with a sub par barrel?