Being closer to the rifling does not always result in the most accurate load.You have to experiment to see what works best in your gun.I have one gun that shoots consistant 1/2" groups and the bullets sit .220" off the rifling.The throat is long so this is as close as I can get and still fit the magazine but since the accuracy is so good I couldn' t care less.I have another rifle that shoots best with the bullets .070" off the rifling and it too shoots consistant 1/2" or better groups.