I have a 250 on my TCR 6 weight, and the TCR handles it with noooo problem. I could probably put a 10 weight on that TCR and it would cast it . . . The 250 would probably load your GL3 nicely. I'm not sure where you're located, but I'm up in the north Seattle area and you're welcome to try my line on your rod to decide on which line to spend your $60.