I guess with enough of a projectile weight difference that you could weigh completed rounds and figure out if any were wrong, but even then it is a stretch.
The differences in weight in brass alone with the same projectile and powder charge to make two identical rounds have significant weight differences when tossed on a scale.
Rule #1 - if you aren't sure, don't take chances.
As far as the issue, call Hornady and talk with Michelle Sass in Customer Service. Tell them honestly what the issue is and they will work with you, of that I have no doubt.