I don't bother neck-turning most brass, just cases for super accurate rifles, and then buy brass that's usually really uniform in the first place--or, if that's not possible, sort for relatively uniform case necks.

Brass with significantly heavier necks on one side (say .002" or more) usually has case bodies that are also "lopsided," and tend to curve slightly after being fired or sized. It doesn't help very much to turn the necks of that sort of brass. As a result, the necks I bother turning only have to be skimmed on one side in order to get them under .001" variation.



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