The test curve is the weight required to bend a rod to 90 degrees,for minimum and maximum line strengths miltiply T/c X3 for minimum and X6 for maximum,thats the rule of thumb inwas taught anyway.I saw a guy last year targetting carp with an uptide rod and 80lb breaking strain braid,he was trying for 100+ carp though,and stood a good chance of hooking bigger fish of different species.
Well i didnt know that, cheers for the info. So would it be daft to put 16lb line on a 2.75tc? I normally 12lb but after 8 trips to a certain lake without a fish (this isnt unheard of at this lake) i finally hoo