My first OCW test was similar, but I followed protocol.
I was shooting Berger, so I followed their recommendation for testing jump/loading length.
Sure enough, I increased the jump, and then shot a group at 200 yards that was smaller than my best load at 100 at the OCW.
Find an Optimal Charge Weight, and then work on OAL/jump. It was like magic when it all came together.
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