Benchrest shooters are insanely obsessed with the idea that tweaking the tiniest aspect of the load (tuning) will produce the best precision for the conditions, going so far as to "tune" during matches by changing the load during relays.
I have not seen any convincing evidence that the "tuning" aspect is anything more than a sport entirely consisting of confirmation bias, playing in the noise, and the results are essentially random as far as the tuning - the winners are the best shooters with the best built guns.
That's my working theory but I'd love to see some meaningful data. That whole thread is nonsense speculation and theory. Just go shoot some 30 round groups with a tuned vs slightly "out of tune" load and prove the difference. It isn't a hard test.
The next question, if there was a difference, would be - can it be resolved and is it practically significant for any particular use? And is it worth trying to identify when the process to genuinely identify it is impractical.
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