I have used both 2 and 3F and still have both. I use 2F in my .12ga smoothie. The 3F I just found not long ago hidden away. I figure I will use in my .36 cal Squirrel rifle. When I used it in my .54 and .58 it was very accuarte and clean burning but I found I can get the same small groups using Graff powder, then it was, do I spend twice as much for a lb of powder or is it really worth it? I'm a hunter not a paper puncher. If I shot in serious competition then I might think about using Swiss, as I don't, I really don't need it. But it is the best powder for sure and priced as such.