PyroData

5FA (sometimes written FFFFFA) is high performance black powder that has been corned and screened to show a particle size ranging between 20 and 40 mesh (GOEX standard). See Gunpowder Grades.

4FA (sometimes written FFFFA) is high performance black powder that has been corned and screened to show a particle size ranging between 12 and 20 mesh (GOEX standard). See Gunpowder Grades.

2FA (sometimes written FFA) is high performance black powder that has been corned and screened to show a particle size ranging between 4 and 10 mesh (GOEX standard). See Gunpowder Grades.