Has anyone out there used Olin WC852 surplus powder for .308win, or .300WinMag?The re-packaged powder is marked as"Olin WC852(H-450 type)".I know that this is the slower lot of powder.I have load data for H-450, but I'm just trying to find out all the info I can before trying to load this powder(Got a GOOD deal on a 8 lbs. keg).Thanks. Skullboy.