Didn't reload that caliber but Igman brass for 50 BMG is some good stuff. I've read posts on 50 Cal boards that guys have got 10+ reloads on the brass. The brass is good quality, necks turn down easily and primer pockets true up easy.
I buy all that I can if someone is selling it, its worth buying and keeping for a rainy day. If you buy loaded ammo, clean your rifle like its corrosive. 80's 50 BMG Igman was found to be mildly corrosive, it took about 10 days for the steel to start rusting but it did and the test piece didn't. Not sure if the newer stuff has been changed so keep it in mind.