Re: FFFF down the shoot first ???
This comes up just about every year on here. It is very dangerous to use 4f down the barrel under any circumstances. The granulation of this powder is fine and is designed only as an ignition powder outside the barrel. Using 4f with pyrodex is an extremely bad idea in my opinion. You would most likely be exceeding the pressures recommended from the manufacturer of your gun and you are mixing blackpowder with a substitute propellant which is never recommended by any gun or powder manufacturer. I can speak from experience that 4f down the barrel can stress and even blow-up a barrel. Your fun is not worth your life or a buddies life at the range. Enough preaching from me