Tim,
Sierra Fisher and Wolfgang are giving you good information. Leader Links
allow you to change leaders quickly and they last a long time. They don't
catch moss, cause drag or make a splash and they transfer power well. They
are strong and you will break your tippet long before you break them. They
are very economical.
Leader Link - A small nylon device that connects your line to the leader
with a simple overhand knot. Can be purchased from Eagle Claw Country Store
Phone 1-800-628-0108. Get LL1 for tapered lines and LL2 for level lines.
Ernie

"haresear" wrote in message
My Question: Are loop connectors at the end of your fly line an
advantage? They sure make it easy to change leaders, but do they
provide sufficient transfer of energy from line to leader? Is it
"better" to use a nail knot? Or does it matter?
Tim