My personal experience with Winchester brass for the 300 Win Mag is by the time you perform the quality control on it for Winchester (if they have QC, it is severely lacking by my standards) you end up paying just as much or more for it, as you would for ADG Brass, and you are on the hook for your time to complete that.
All brass prep and inspection should be completed before your weight sort.
You can Expect a minimum 10% loss in cases due to obvious visual physical defects, mostly in the neck and shoulder. (Folds, splits, and globular deformations)
Up to Another 10% loss in the combined area of crooked necks that won't clean up with trimming to minimum length, and weight variation outside a 3 grain tolerance. These cases can be fired, as foulers or spotters, and the necks may clean up on the subsequent trim, so not a total loss.
Case length will vary substantially, but for the most part, within tolerance. Some will be shorter than minimum length. I set these aside and re evaluate after fire forming.
You will need to 100% check case lengths and trim all to minimum length.
You will also need to do 100% flash hole and primer pocket uniform.
After completing all this, my experience is what remains is good brass.
By my standards, ADG Brass just requires visual inspection, case length checking, rounding necks in sizing die, and weight sorting, prior to loading.
My experience with ADG is 100% usability and good brass.