220 rounds of .308 / 7.62 NATO. Bought on Midway.com in 2018. Austrian military surplus. Here is the listing for them: https://www.midwayusa.com/product/REDACTED?pid=109678 The rounds were shipped in a lot of 240. I've shot some. All the boxes of 20 have been opened and resealed before I got them. Reseal tape is marked with initials that look non-US. Definitely old and not shiny, but haven't  had misfires. Casings are brass. Berdan primers. They are very fast high pressure rounds.