I found a bag of new Win. 6mm on the back of one of my shelfs not too long ago. From back when I had a 6AI, so it would be at least 15 years old. I don't remember too much about the quality, other than I know I was never too thrilled with any 6mm brass I ever used (which is why I never built another one, been all .243AI ever since...). But this Win. must have been the best I could find at the time, else I wouldn't have used it.
I really ought to sort through some of my crap and have a garage sale one of these days... Got probably the better part of a literal ton of stuff I'll never use.
- DAA