Lefty Kreh made the 50% rule for leaders and I use it all the time. A 9ft leader is kind of standard. There is a very simple formula, the one made by Lefty.
4+2+1+2=9
4.5+6+3+1.5+3=13.5
We start with 50 and taper down to 15. We start 4ft of 50lb, 2ft of 30lb, 1ft of 25lb then double the last distance of 2ft of 15lb.
