I tend to agree - if your shots are pulling high and right, and have an 8” spread at 60 yards, it’s probably you, and not the scope or the rifle. It’s been my experience that the spread can be reduced with better breath control. Firing high and right typically indicates that you’re anticipating your shot, and subconsciously fighting the recoil - even before it happens.
It might not be a bad idea to have a local professional spend a little time with you. It shouldn’t take long to knock the rust off and lose the bad habits.
Best of luck!