What kind of base do you have? Also have you tried switching ammo? Reason i ask because i had the same problem, different brand and i had a adjustable rear base that cabelas put on for me. That kind of fixed the problem. Next it was the ammo that was throwing me off, i would hit close to the center and the next 5 would be way off, i was using a shooting rest, went from winchester supremes, to federal fusions and that did the trick. Also a quick was to bore site is put a good bulls eye target about 25 yrds out and remove your bolt or receiver mechanism and bore sight it by eye. Get the bulls eye as centered in your barrell as possible and then line your scope up with that. It will get you very close if you dont have a bore sighter. I am cheap so that is what I do and it saves time and $
