Hey guys, I didn't mean to stir up a hornets nest with this question. Sometimes the problem might be the same but the cause is different. Anyway I tried different rings (warne QR) and got the same thing, shooting too low. I guess my Nikon scope had more adjustment than this Bushnell.There is a slight gap at the front of the base and not at the back, meaning the barrel starts to taper before the end of the base. My Omega is not that way, tight fit from front to rear. I called Bushnell and got no satisfiaction at all. The lady said you might have to use some shims. I asked if there was some internal adjustments that needed to be made and she just said NO. All I can do is put the scope on a different rifle or shim the base. For a 300.00 scope you shouldn't have to modify anything.