Advanced Marksmanship Time lapse through the scope video? Am I imagining things

[Bigwheels]

I had thought of an ammo temp change but just a couple weeks back I chrony'd my loads after switching powder lots. Made an adjustment & tested again the following week. MV was normal in 33-34* temps. Same load that day only 1-2* cooler.
Lately our temps have only fluctuated about 10* during the day.

 

[Dunraven]

saw a video on this at Vortex.

 

[Dthomas3523]

This is why I’m almost as surprised when my zero is in the *exact* same place. I’m used to it sometimes being .1 or so within the last zero.

Especially down here in the summer. Laying on the group when it’s 110 outside creates quite a bit of mirage down low.