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Much ado about not much. Rounds of factory ammo in a box can vary more than 15 fps +/-, and it is about impossible to get even the most careful handloads much under that variance. Chasing a goal of having every round leave the muzzle at exactly 2600 fps is a fine, clean, hobby, but so is putting that salt on a bird's tail. Good luck!
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Amen...
I'll worry more about things like neck tension before minutiae like this that are beyond our ability to control. I'd bet you could put absolutely identical powder loads into identical cases with identical bullets and still get a velocity spread just based on how the powder ends up lying the case at time of ignition.
JMO, but learning wind calls is my priority. My time is better spent sending "reasonably" precise loads 1K yards downrange rather then spending days on end in front the Crony.