I just received a new VXII 6-18 AO scope. I've only had it out once and it seems similarly as sharp as my VXII 4-12 AO until I get it up over about 14x and then it seems to get (hard to describe) not as sharp. Almost like there was a bit of mirage but the barrel wasn't warm at the time and it was pretty cool out. The target I was looking at was 50 yards away. Is this normal or should I send it in?




















































