This place was listed in another thread.
http://www.patsreloading.com/patsrel/prices.htm
WC-846 Surplus- for 223 thru 308, military rifle ball powder, Has a burning rate from a little faster than H335 to almost the same as BLC2, reduce BLC-2 starting data by 10% to start, Some starting data on jug for 308 data, 8#- $64.00