Dwayne like i said a pound cost the same regardless of granulation. If FFFG produces more fps i can use less. Less powder is a shorter powder column too. More usable barrel. This can matter to guys shooting things like the Optima V2 pistol.
Im also curious how you came up with Triple7 FFFG is harder on your rifle?
The comparison of 2f via 3f. ... 3f is a finer grain, which will ignite faster and produce a higher pressure
in the barrel compared to 2f. If the FPS is hardly noticeable, the deer don't care.
Price wise, 3f is more costly around here. 4f is even more. t7 is even more at any F rating.
1. If 2f is cheaper, why not use 2f.
2. 2f doesn't produce as high as pressure as 3f. It may not be that much higher, but why mess with it?
Might as well use 4f as the main charge then. . ..produce more pressure faster and spin that conical out
faster. . using less powder. That does not make it safer. There is a reason why they say 2f for 50 cal and larger, and 3f for 50 cal or less.
It is all on how you look at things.
And yes, shorter barrels are better for 3f. The conical is out usually before full pressure is reached,
and the amount of powder you use will not reach as high pressure as a longer barrel with 100 grains
compared to 30 grains.