Been reloading with accuracy as my ultimate goal for 30 years.
FINALLY about 6-8 years ago accepted
NO WAY can I possibly at this point in this day and age of ultra high tech reloading gear afford let alone justify to spend the money needed to reach my ultimate accuracy goals as the cost of the better annealing units and ultra high accuracy powder dispenser/scale combos were just to costly FOR ME. Now add in the cost of other very useful reloading tools that check for bullet and case concentricity and it quickly starts to add up to thousands of dollars.
I have reloaded A LOT of 338wm, 300wm, 300wsm, 35 Remington, 7mmstw, 6.5x55. Used Winchester, Federal, Remington, Hornady and in 308win Lapua brass. Please bare in mind all my rifles are 100% factory stock save for some have AM triggers in them. I honestly can say it all gave me consistent MOA or sub MOA reloads AFTER I prepped it and uniformed at to the best of the abilities of my reloading tools and culled out any pieces with unacceptable or uncorrectable defects, which if again IIRC weren't that many.
What IMO made the biggest difference in my accuracy (way more than brass) was going to the combination of free floating micrometer bullet seating dies with Redding body only sizing dies and Lee Collet dies
If you do buy Winchester brass just due your due diligence and carefully inspect each case for imperfections or inconsistencies paying close attention to the primer pockets and case necks and mouths. Again this is MY opinion only but unless you have exceptionally high accuracy goals with your shooting the Winchester brass should serve you well.
My most recent personal experience of the last five years with Hornady brass in 300wsm and 35R I would rank it as the best of the legitimate NOT match grade brass like Lapua or Norma and if you can afford it I would recommend the Hornady brass over the Winchester