It's a matter of personal choice, plus what your gun likes. While most guns will prime with FFG, I like FFFG because it both as charge, and prime, as I don't have to deal with two powders. For FFFG you would reduce you load by about ten percent over FFG powder. I buy by the case, so one order is 25 lbs of FFG, and the next is half and half FFG, and FFG, plus maybe a pound of FFFFG, as I use it in my small bores for prime. Like Teddy Roosevelt, I may not shoot that well, but I shoot often. I use the FFG in my big bores .60 and up, and in my BP cartridges. Did you get the PM I sent you.