Recieved my PMC 62gr X-Tac steel core ammo from AIM surplus the other day. I went to the range and shot iron sights from sandbags. Nice solid concrete bench. Anyway I adjusted my sights all the way to the right and I can not get the gun to hit dead center at 100 yards. My group is about 2 inches to the left of center and I have no room for adjustment. What should I do? Is this acceptable for a battle rifle? I am disapointed. BTW I have a 580 serries with the new barrel contour. I think I picked it up in 2008.