I know that March jumped out there and brought a new scope to the line with the intended purpose of being used in the new SR rules that allow optics. Has anyone used it enough to have a good review? I know it's got parallax adj, which is unique in this class of scope. I think the next big deal will be finding the right retical that is useful at 600 in a 4.5x configuration. How is this one? Has anyone tried any others?