I had my guns pretty well sighted in at 300 yards. 7mm and 260 both with Rem700 actions. I went out and shot at 600. Found that the windage was anywhere from .5 to 1 MOA off to the right. There was zero wind blowing. I went back to 300 yards and found that both guns were now .5MOA to 1 MOA off to the left. So it seems that both guns shoot to the right, which I find kinda strange. Sounds like a shooter problem and not a gun problem. Is this common? What are some of the causes? I'd think that the cross hairs are aligned correctly.