I thought that ffffg was what you were supposed to use until I left it at home one day. Used fffg from my flask and was surprised that it seemed to work better. Like they said above, fffg or ffg should work just fine.
Yeah, for some bizarre unknown reason everyone is under the misguided belief that 4f only exists for pan powder use.
It is not a pan powder, it is in its own right a main charge powder just as is other grades.
It tickles me when folk sound surprised that other grades work just fine in their pans. All because that's why 4f exists right? Pan powder.