Thread: What could cause this?

Hey team,

Shot two rifles yesterday.

Tikka T3 308 18” - Leupold vx5 - talley rings - Hardy can
Shooting Superformance 150sst

REM 700 CDL 7mm-08 18” - Leupold vx3 - talley rings - DPT can
Shooting REM corelokt 140gr

Both rifles were zeroed at 100y and were shooting sub MOA (REM slightly tighter)
The question I have is at 300y…

Conditions:
18C, 1023 pressure, 49% hum,
Wind: about as calm as you can hope for. Small puffs of breeze intermittently.
If there was a puff, at the shooter it was from 180 degrees. At the target it would puff either left or right. Very light though.

At the 300y, the 308: elevation good,but ~3.75inches to the right
7mm 08: elevation good. But ~3.5 inches to left. *I did a third shot but it was a flyer and I knew it would be (same height but out to the left quite a bit)
Both groups were still MOA


Could the small puffs of wind have this effect? Or Is it more likely my shooting position,
I tried to keep it as consistent as possible. Or is it something else.