I use a lot of it as it is much like H-110, W-296, or even Alliant's version MP-300, which is the slowest of these St Marks made powders.
I bought 16# right before powder jumped up so much in price.
For years, I have bought the least expensive of these I could find, which used to be W-296 but since 11FS came out I have bought it instead.
I wonder if it will quit being sold now that Hodgen bought Accurate Powder.