A good friend of mine just picked up a used older Ruger 77 in 270 win at a Cabela's store. It came with a nice set of Leupold mounts and so he bought a Redfield scope. He let them mount it and bore sight it. Now, this afternoon he stopped over to sight it in at my farm and I asked who mounted the scope because it was clocked 90 degrees off. He said he was wondering why it took them so long to bore sight it, lol! But the real problem is that after we corrected it, it won't hold zero. Is it possible to over travel with the wind age and elevation adjustment knobs? I geuss I don't know if there is a stop at maximum travel because I never had to find out. I can just imagine some kid in back at where he bought it cranking on the adjustment because he did t know enough to put the darn thing on right in the first place!