Help needed in diagnosing bullet speed variations

[Fairchaser]

Looking just at your target, you got a change in wind on shots 7-10. It settled down and it tighten back up. That's how it goes shooting ftr.
A head or tailwind will give me vertical big time.

I agree with you about the wind. The wind didn’t affect the fps out of the barrel for shot 9 and 10. That spike of speed at 2641 and then the drop off to 2600 is what I’m wanting to understand. Is that a loading issue or gun handling issue like shoulder pressure? Since these two shots were back to back, it would not likely be a loading issue statistically. But, idk?