R&R Arms has a great deal on Alliant Promo powder...about $80 for 8lbs. Price sounds great!! The problem is I never heard of this powder before and it doesn't show up on any of the current burn rate charts so I have no idea what application this stuff is good for. On top of that the Alliant reloading data site has been down for about two weeks. Has anyone here had experience with this powder and if so what is it intended use?