After my earlier experiences with the conquest I couldn't resist the Terra offering for a new Ruger Hawkeye. Mounted, bore sighted, -then when trying to zero at 100 yds, I could barely adjust the elevation, in fact the turret seemed frozen. I was also having grouping issues as well. Got frustrated, thinking I had a bad scope, and took it back to the dealer. He defended the product, said I had just ran out of adjustment range. So I kept the scope, located what should have been factory mid point on both turrets and put on another "proven rifle"-a Weatherby HB-ST.
Long story short, the Weatherby repeatedly shot 1/2" groups with the Terra, and the adjustments were easily made to the turrets. The factory just failed to set the scope adjustments at the midrange. As for the Ruger, I put a "proven" Nikon scope on it and groups still suffered. Turns out the mag box was exerting stress on the action and groups were reflecting that issue. Once I fixed the mag box problem it starting grouping MOA.
I was more than happy just to leave the Terra on the Weatherby.
