When I last loaded up some Grendel, I weighed the completed loads for curiosity and found up to 1.5gr difference. So I randomly checked my Lapua brass and found similar results to you. I was surprised about that much variation from Lapua![]()
Since mine is for hunting and they all grouped well, I didn't bother with it any further.
With new brass, I only chamfer, size & load.
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