FFG and FFFG

[PA BEN]

What does FFG and FFFG mean? And what the difference?

[whacker1]

I don't know the technical meaning, but FFG burns a little slower and is more commonly used in long guns.  FFFG burns faster and more commonly used in pistols.

However, I am currently using 70 grains of 777 in FFFG in my .54 cal, because I was able to get it to put together tighter group with it.  I am however testing some other bullets this spring and will be going back and forth between FFG and FFFG.  I would prefer to shoot 80 to 100 grains of FFG, because I am told that it should carry more velocity and energy, because it provides a longer push down the barrel than a more explosive bang.   I would prefer to have a little flatter trajectory and still hold tight groups if I can.

Bottom line is that I am going to shoot whatever performs the best in that gun.

[Whitelightning]

The F's are a granular sizing means. The more F's the smaller the granular size and thus the finer the powder making it easier to ignite. At least I believe this to be correct.

[Dirty Mike]

thats correct

[Hangfire]

Generally 4f is for priming flintlocks, small and faster burning.

Manufactures recommend 3f for guns 45 cal. and smaller. I always used 3 f in my 50 cal. When I was shooting a lot at matches, that was the comman useage.

Larger than 50 cal, used 2f.  1 f was for cannons.

Small granules burn faster and more pressure. I could probably use 2f in my 54 cal, but would reduce from 110 grains to around 80 gr.

Use the manufactures recommendations for each gun.  I tested all my guns when built,  with a stout charge, and fired with a string when they were set off the first time, while I stood behind something like  tree.