Some are of the opinion that NK sized brass better “fits” the chamber than FL sized and consequently is more “accurate/consistent” but IME, that is not the case. The main benefit of NK sizing only is that it likely improves the service life of the brass. And, sooner or later, NK sized brass will need to be FL sized. Any change made during brass prep can change downrange results which means that NK sized brass may not give the same POI as FL sized brass.
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Old Guys Rule
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