I have been using the Leupold VXIII 6.5-20 for a while now. I have had problems with it being focused when I adjust for parallax. I also am not happy with the having to go to zero and starting over when I adjust the parallax because of the backlash. I bought the leupold because of their bullet proof warranty. This is my last one. I have been looking at the Zeiss Conquest for my next purchase. The downside to the Zeiss is their limited elevation adjustment. I can't quite afford a Nightforce.