There is more to leaders than just breaking strength. There is also
resistance to abrasion, stiffness, knotting, etc. Rio markets three
different types of 100% fluorocarbon. The older Fluorocarbon Plus is
probably the best for most fishermen because of its abrasion reistance and
price.
However if you buy a 4 pound fluorocarbon line and you test it and it
breaks near 4 pounds, you shouldn't complain about its lack of strength.
Lines are supposed to break near their stated breaking point. I'm not sure
that stiffness is an important consideration in anything except fly fishing.

--


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"Sarge" wrote in message
...
Bill wrote: "Given the same pound test, what is the difference in Berkley®
Vanish Fluorocarbon (or any fluorocarbon for that matter) sold as "Leader"
material in 15 yard spools for $20 and Berkley Fluorocarbon that is sold
on
bulk spools of 300 yards for $12?"

The price

It is market that way because some people do not want to spool their reels
with fluorocarbon but still want to use a little for a leader. The spools
are smaller so they take up less room in the tackle box. It is part of
the
marketing strategy to make you think it is specific designed as leader
material.

If you want to buy in bulk and keep the spool at the house and carry some
for use as leaders try wounding some around a thread spool. There is
usually a small slot to slip the end over to keep it from unraveling in
your
tackle box.

Sarge