Quote Originally Posted by Bamboozle
Nail knot a 24" or so section of heavy butt material to your fly line and tie a Perfection Loop in the end. Do the same to your leaders and then loop-to-loop.

You'll hear all kinds of pro and con on the connection and its effect on everything from casting to global warming but the bottom line is if you want fast leader swaps; it is the best choice IMHO.

I've been doing it for years with no ill effects.
Dear fishinnstudyin,

I second Bamboozle's advice, though I will admit that I keep my permanent butt section shorter than 24".

If you don't have "butt material" laying around just use the butt section of an old leader that you have already attached to your flyline and put a loop in it.

I think I nail knotted exactly one leader to a fly line in my lifetime. After that I made a loop in that leader and have used loop to loop ever since.

If you are concerned about the nail knot passing through your guides Loon Outdoor's UV Knot Sense is great stuff for coating knots.

Best Wishes,
Avalon