Promo is a blend according to an Alliant tech via phone call when it was first introduced. Powder that didn't make the cut for canister grade as Red Dot or American Select or Green Dot is blended to the approximate performance of Red Dot without the density consistency. I've had good success with it. The density varies with lot, but then so does modern day Red Dot. I'm currently using a MEC 35 bushing to throw 19.5 grains of Red Dot (the stuff is fluffy) and anything less under 1 oz of shot won't burn completely. This powder is about three years old.
