Winchester brass is obnoxious. I got a bunch of 300 win mag and 8mm Winchester brass, and it is horribly inconsistent.
I've found cases that are warped, wrinkled, missing flash holes, cases with big spools of brass shoved down in them, etc. Most of the 300 win mag brass I bought was thicker on one side, than the other, by .002" (including the neck, it is VISIBLY thicker on one side).
By the time I finish weight sorting, neck sizing, uniforming the pocket, it damn near wears me out to the point I don't want to look at the things anymore.
Next time I buy rifle brass, I'm getting Lapua, Nosler, or Norma. Period. I'm done with Winchester and their evil cousins Remington (who makes equally gnarly brass).
The quality is worth the extra money they cost.