What seating depths are you working with? I assume you are reloading since you mention 41.2 grains. The 168's and 180's will probably not like the same seating depth. For me it is hard to follow your process as I am unsure of your approach. That is not meant to be a dig at all, just not sure how you particularly go about looking for accurate load etc. Some bullets like a big jump, others like to be crushed into the lands, etc.
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