Olin Matheson/Winchester sold off their brass rolling plant two decades ago. All Winchester brass is made under contract by someone else. There is an ugly rumor circulating on the Internet that some is made in China. I don't know if that's true or not, but I've had poor results with Winchester brass, so stopped buying it. I had to throw some Win .45 Colt brass in the recycle bucket, the heads and rims were so soft, they deformed in the shell holder while reloading. I buy PPU, REM, or Hornady for bottleneck rifle, and Starline for pistol brass. No new Winchester at this house, but if you can find it, old W-W brass from the 70's, 80's, and 90's is top quality.