I have purchased a 69 cal traditions cannon. I have some ffg powder from my muzzle loader but I also have 3 lbs of fffg that I would like to use in . is this possiable and do I have to adjust the charge. they recommend 80 grains. would really like to know as I nolonger have my pistol that I used the ffg in.... thanks.....
As you know 3F is faster burning than 2F. In a 69 caliber rifle 3F is usable so no reason it won't work in the cannon. Fire three shoots with 80 grains of 2F and check hit location on target. I would start at 65 grains of 3F, that should be well into the safe zone. Add 5 grains at a time till 3F load hits at same elevation, you have now matched 2F velocity. My guess is about 75 grains will be the outcome.
ffg and fffg for 69 cal cannon
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