Re: length for a leader?
I like a three part leader most of the time for bass on a floating line . One with 60" of 40# for the butt, 20" of 25# for the mid, and 20" of 12# for the tippet is easy.
If I was going to go with a straight mono leader of 10# test, I would not make it much more than 6 feet long.
That's about as long as you can make it and still expect it to turn over
The simpler the outfit, the more skill it takes to manage it, and the more pleasure one gets in his achievements.” --- Horace Kephart