If all the other stuff mentioned you have done then it very well could be a bad scope, I guess...I sure wouldn't think so but stranger things have happened...If I had done all the stuff I had mentioned and it still didn't shoot, I would take the scope back to where I bought it and get another, if it still didn't shoot, I would be taking the whole set up to where I bought the gun and having them fix it....Best of luck to you, I hope youget her fixed up brother....