WD, i am holding off about 6 " at max power. with the HS brake the recoil off of the bench(using a harris bipod) is coming up more than straight back, so the scope is actually moving in a downwards motion. Iam holding a much firmer grip than with the burris, actuallu trying to keeping arm much stifferand taking recoil at the wrist. holding with tight right hand and the left is controlling the rear bag and adding some support for the right hand. My groups with the 300 were in the 1/2" range and had 3 shots inside of a 1/4" square with the 7WSM. I will try to post a couple of the groups .