RE: do i have to resize brand new brass
Seconds on brass isn't right. I've bought some bad and good RP brass. Its been luck of the draw. Just like factory ammo. But its not seconds at all.
You've been told why the necks are dinged. And there is no acid wash. Thats annealing marks. If you tumbling long enough they'll go away but you'd have to pay RP extra to do that. Why worry? Annealing is good for the brass.
So much mis/dis- information floating around.
Jeff