sportsman guide usually has battle packs. they currently have some Austrian made 1980's run brass case non corrosive reloadable stuff in stock. they have free shipping as well through june 8th. they usually have pmc in battle packs as well, they just happen to be out of them at the moment. thats good stuff
It's not in battle packs, but SGAmmo has Prvi's 168gr BTHP Match ammo for $14.95/box. It's not quite up to Federal GMM level, but very good for the price. I'm not sure how important the battle pack part is to you, but $10 (per 200 rounds) to upgrade from 145 gr bulk FMJ rounds to 168 gr BTHP Match rounds is a no brainer for me.