if you have handloading for competion by, glen d. zediker,
he puts a good point across, that many handloaders seperate by weight only because they have scales,
And states that it the primer pockets are clean, flash holes deburred, and case necks chamfered, then these are the best ways of improving consistancy..... and accuracy...
If going to extreme lengths to see if your brass is good enough, then he suggests wall thickness of the cases as the most important factor.
uniformity, body concentricity, neck concentricity, neck turning......
If you get pleasure from weighi