You have got to stretch your fluorocarbon to get better casting distance. I've stated here a bunch of times how beneficial it is not only helps in ease of use but money wise as well. Tie a swivel to a post - tie your line to it and walk out a good long cast distance..... and tug/stretch your line. You will notice almost immediately how limp it gets.

Vanish = BAD
Vicious or Vicious Pro = BAD

InvizX or Red Label = Good
Berkley 100% = Good (anything over 12 lbs and/or on a baitcaster not my spinning outfit)

IMHO