If a guy isn't in a rush, Cabela's has their Nosler brass on sale right now, and you are able to backorder the .280AI stuff. Their website says they are about a week out for shipping:
http://www.cabelas.com/product/Nosler-reg-Custom-Rifle-Brass/731922.uts?searchPath=%2Fbrowse.cmd%3FcategoryId%3D734095080%26CQ_search%3Dnosler%2Bbrass
