One ammo I'd like to try is Talon's White Feather 308
http://www.snipercountry.com/WhiteFeather.htm this ammo is named after Carlos Hathcock II and from what I understand his family gets a small royalty from ammo sales.
I've read good things about this ammo but have never found any place that carries it, Anybody have a source for White Feather ammo???