Finding the correct line for Spey Rod
First I am brand new to Spey, Skagit & Scandi casting so the questions will be elementary to many of you.
A few years ago the FFF provided clubs free rod blanks if they conducted a rod building class, having built all the trout rods I wanted I thought 'hey' here is a way to get a Spey rod at a reasonable cost - probably a mistake - oh well.
So I built a 15 ft, 10 wt, 3 piece Spey Rod, the FFF informs me that most of the rod blanks came from Redington, so it is reasonable to think it is a Redington Rod.
Now how to determine the correct line weight (grains) to throw with this rod.
Would appreciate any constructive inputs.