Rifle Scopes Nikon FX1000 4-16x Losing zero?

chickon1

Sergeant of the Hide
Full Member
Minuteman
Oct 17, 2019
193
65
Nicevile, FL
Anyone have any issues with this scope completely losing zero. I was shooting the other day at 1000 yds dead on target, then all the sudden my BI was about 20 moa low. The shot was still inline with the target. Not sure if it is a rifle issue or a scope issue. Once it dropped, it stayed there for another 3-4 shots. On a AR-10 6.5CM platform w/Burris PERF mount.

Checked the mount and screws, nothing was lose. Checked the barrel mount as well.

Never had this happen before but my other scope is a Vortex Razor.