It may be a scope problem (1st Gen 3-9X Redfield) or it may be a mount problem, but I am unable to zero. With the scope's windage cranked as far left as it will go, I am still four inches to the right at 25 yards. I will have to dig through my pile of scopes to see if I have anything to replace the Redfield with, but I am pretty sure I don't have another 3-9X of any flavor. If it IS a mount problem, what are your suggestions? I have heard Burris offset rings mentioned, but I can't find a tutorial on how they work. FWIW, the rifle is an M14 built on an Armscorp receiver with a Douglas match barrel. At 25 yards with this scope and mount combo, it was piling three rounds into one hole....just not in the right place!