AFTMA Fly line weight ratings (grains)

Weight Grains Tolerable Range
1 60 54-66
2 80 74-86
3 100 94-106
4 120 114-126
5 140 134-146
6 160 152-168
7 185 177-193
8 210 202-218
9 240 230-250
10 280 270-290
11 330 318-342
12 380 368-392
Grains are weighed over front 30 feet of line.