Who said anything about " U.S." Military ballistic data. As far as I know the U.S. Military hasn't done much more than play around with the .338 Lapua Magnum. It is used extensively by Canadain, British, Australian, Swedish and German forces though, and ballistic data is readily available. Wikipedia is probably the easiest to access.
The standard military ball round as loaded by Lapua is their 250 grain lock-base bullet at 2950-3000fps. That's what I've been trying to duplicate. While I've gotten some excellent accuracy the velocity still falls short before the rifle starts getting balky.