I don't know what has happened to Winchester rifle brass in the last six years. I've been reloading the 270 Win since 1976 with Winchester brass and if I recall correctly I really started seeing the quality drop around 2014. The best Win brass I've got was in the 20 count cardboard boxes with the WW Super headstamp. I've got over 8 loads on that brass in the same rifle and is showing no signs of head separation or neck splits (neck anneal every 3 loads). My newest bag of Win brass had 7 necks folded in the manufacturing process and after informing Winchester with photos they sent me a new bag. Unfortunately that brass started head separation signs after the 4th reload. My old over 10 years batches of Winchester 243, 270, 308, 30-06, and 338 Win Mag is some of the finest brass I've seen and use but I don't know what is going on now with their production ... makes me think it is out sourced to someone else to make now. I'm looking very strongly at Petersen brass now, not thrilled with any of the other 270 brass out there.