Placed an order with Graf for 5 pounds of 3F, their brand and 1 pound of the 2F along with a box of 12 gage paper hulls. I’ve been working on “square” loads, equal parts by volume of shot and powder, for an old double barrel shotgun. So far one ounce of #8 shot and an equal amount of 3F powder, by volume has looked good. Wondering if the 2F, being more bulky, would allow the same shot column, and therefore a good crimp, but less energetic. Any one here loading blackpowder shot shells.