Not only is the point of impact too high,these things are not very stable. They twist under recoil and don't usually hold zero like standard mounts do. If you've got to hold your head up off of the stock while shooting you're not going to see the same sight picture each shot. I had one guy come to our range on a public site-in day who had these on a 30-06. His gun or him, was shooting all over the place at 50 yds. With iron sights it was fine. A gunsmith,who shows up for technical advice and to fix broke guns that some guy pulled out of the closet and hasn't shot in who knows how many years, asked if he could replace the mounts and rings to check something. Of course the shooter,who was getting pretty disgusted,agreed. After replacing ,this rifle was shooting moa at 100 yds. The shooter happily paid the fee for the work and parts.The gunsmith threw the old mounts in the trash.
I had one guy,when asked why he had these mounts on a 243,tell us that he used the scope to look through only then used the sites to shoot. Makes you glad that you hunt on Private Land and don't have to be around that guy!!!!