That looks fine there!! I only now insist that if I purchase a scope it has 3.75 inches of relief on it. And I like more, like 4 inches even better. I use a very loose style of hold, letting the rifle surprise me when I shoot and then letting my shoulder catch the recoil. That could account for some of MY problems.
Actually the Millett was a very good shooting scope. I had that on a Knight LK rifle and the Sightron on a Knight LK rifle. Both of them were very accurate. BUT I got tired of my hat getting hit every time I shot it. It was so bad, I used to turn it around on my head, like some rapper.