I can only say what works for me and my rifles. I have adapted to using 3fff in all my rifles. I use it in my .32,.36,.45,.50 and .54
all of which are percussion.I also have a .50 F/L that I use 3fff
as the main charge but grind it down a bit for the pan.I have never
had an ignition problem.I use to keep 2ff,3fff and even 4ffff....I have
been able to work with 3fff Goex in all applications....and only
Goex,but that is a personal choice.
snake-eyes