yes, the 3030fps looks like a real outlier, maybe a bit more powder in that one. But going from 0.5moa to 2moa seems like something else is up.
Have you checked your action screws and bases/rings for torque? could be that bewtween your 2 visits to range that one has worked loose.
Is the brass in the 2nd set of 5 now 2x fired ? or still once fired ?
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