Witch magnification power setting do I need to be on for correctly estimating range? I read online that it is at 10x, and you can double it for 20x (or half?). I called Leupold and the guy said "Great question, hold on." Put me on hold for a second and came back and said its set for 20x and 10x you can double/half (whichever it is). I'm still a noob to this scope so I just want to make sure I'm learning my scope correctly. The guy didnt sound too sure so I'm just double checking. Any owners of this scope out there? Can you please help!