20 minutes ago, MickD said:

The difference between FC and braid for stretch is dramatic.  I can feel significant stretch in just 3 feet of FC, zero in braid.  Get 75 feet of FC out there and it feels like a rubber band (only a little exaggeration).  Stretch testing indicates that FC isn't significantly better than mono, in some cases more stretch.

 

Retying the leader to line knot during a day of fishing is rare.

 

So there are no pike where you fish? No muskies? I fish a lot in WI and MN and there's plenty of pike. If you don't have to re-tie a leader during the day, you're lucky. I've been bit off a dozen times in a day. 

And the difference between a 6 foot leader and a 12 foot leader isn't going to effect my ability to catch fish.

I thought we were talking about retying the line to leader knot.  Yes, we have pike, but not one has ever cut the leader anywhere close to the line to leader knot.  It's always right at the lure.  And you're right, the difference between a 6 and 12 foot leader will not affect your ability to catch fish.  But 12 will have twice the stretch of 6, if that is of any significance.  And 12 will take the knot onto your reel, which I don't prefer.   Just a matter of preference.  I like to start at about 5 feet, and retie a new leader on when it gets down to about 3 or less.