Hello again everyone!! I have been reading and taking in a lot of things that are posted with enthusiasm.

I have a quick question that I decided to present to you all regarding fly line grain. I see alot of people referring to Grain in lines. What is the grain in lines? I know they say it is it the sample of the first 30 feet in line. Is it the weight of line? Does it impact the rate of sinking? How can a line be 500 grain and floating? while there is a 550 grain fast sink?

I have seen that chart posted in several places. it says a 12 weight is 380 grains? then how can you end up with a 500 grain 9 weight??

Any clarification would be greatly appreciated, as all my previous thoughts on the topic is gone.