Bad shooter such as a few here on the fire. Practice more.
Bad rifles
Bad scope. The MK6 was more prone to real optic failures than anything else I have seen from Leupold.
I had a VariX II long ago that worked great as set and forget.
I had an early VX-6 with measurable track out during zoom but it held zero at max zoom.
I have tested and shot a few hundered VX-6 and VX-6 HDs.
Not sure what a “hundered” is, but do you really expect us to believe you’ve shot almost $690k worth of Leupold VX-6 scopes? I read many comments about the infamous Burns Zeroing Mallet, but seriously? Think before you drink, or post.
History repeats itself because it worked. If it didn’t work in the first place, it wouldn’t be history but another lost story of insignificance.
