as said its Hungarian
AIM was selling it for awhile for like $8.50 a box, so a friend and I went halves on a case, and then I reloaded the brass.
To me it felt just like the winchester white box brass when sizing, belling (I load 200 gr SWC), and seating. Never had an issue with priming using either my Pro2000 or a Lee Hand primer. I think it is excellent brass.