Hey guys, I need some advice.

I just picked up this rifle and mounted a Millett TRS-1 (claimed 100 moa elevation range) on medium Burris Xtr rings on a two piece flat Burris picatinny base.

When I bore sight the rifle I can only use the very top 5-10% of my elevation. What's the deal? Is it possible that the barrel is crooked? I leveled the action and put a level on the barrel, it was off a bit but I attribute that to the taper.

What am I doing wrong?