I am sorta surprised that you need a higher front sight myself. My X7 wants a lower front sight if any thing. My peep is set about as high as it will go, and the rifle barely shoots high enough. I wonder if our sights are the same height. UncleNorby suggests that a heavier charge will lower your group. I believe it will.

My present hunting load in the X7 is: 105g BH209, ignited by a Winchester shot gun primer, pushing a 300g Nosler in a crush rib sabot.