FF vs FFF ?


Senior Member
Thread starter #1
what is the difference in FF vs FFF and which should you be using in muzzleloader rifles?
The more "F's",the finer the powder.The finer the powder,the faster it burns.Most recommend "FF" in muzzleloader rifles.In my rifle I use "FFF" after a lot of range experimentation with both powders because I find I get faster more even ignition with "FFF".
HOWEVER, stay away from FFFFg unless you're shooting a flintlock and use it for priming.


Senior Member
If you are going to try the American Pioneer powder, start with the FFFg. Their granules are bigger for some reason and the FFg is hard to measure consistantly.
Uses of various sizes

Goex recommends


I've been using FFg in a 50 cal. flintlock, Thompson Center, for over 30 years.
I recall they made a smaller .45 cal. that they recommended FFFg.

Like everything else, you work up your loads and don't start with a maximum.

Over the years I start with what is recommended by the manufacturers. No use in attempting to reinvent the wheel, right out of the gate.


Senior Member
3FG is the faster burning of the 2, more pressure, more velocity, cleaner burning.
If you have a factory recommended load for 2F and you want to try 3F, back off the measured amount by 20%. Notice I said "Measured" not weighed. Not the same thing.
I use 3F in all my rifles. From .40 to .54.
No desire to change.


Senior Member
For roundballs, fffg is usually going to foul less and produce suitable velocities and accuracy in guns of .58 cal and under. For bullet shooting, you really need to try both. In my experience, one will work better than the other in any particular gun and there's no rhyme or reason as to which one it will be. Either one will work good enough for hunting, but one will be more accutate and foul less. Most of "fouling" issues are more a function of the bore condition than just the powder though. I have not seen a factory made gun that would not benefit greatly from a lapping job as far as fouling goes. I'm talking about "real" black powder, not the artificial stuff.