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First of all, I am not a fan of sorting bullets. It's time consuming and I simply don't have this kind of time anymore.
Sorting bullets is like rediscovering the Bell-shaped curve (normal distribution) all over again. (This is not a math lecture)
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Note that in the OPs original photograph that the majority of the bullets fall into the length category of 1.871 - 1.874 or only 0.003" difference. When I was shooting a lot of long range benchrest, this sorting was deemed to be required for consistency at 1,000 yards or further. The bullets falling into the extreme differences at the beginning and the end were reserved for fouling shots while the majority were used to shoot the match.
You can get disturbed over the variations or choose to work with it. Or dump that manufacturer or bullet type and move on to a manufacturer who uses more consistent manufacturing techniques.
Enjoy the process!