Originally Posted by bhflyfisher
Are you trying to shoot the line? Like a double haul? I wouldn't ever try and double haul a nymph rig, you're asking for trouble right there. You should try and master the roll cast to cast that stuff, or try using the water to load the rod for you at the end of your drift to flip the fly back upstream.
I'll add one more variable and that is the fly rod. Adding all that stuff adds mass. It could be that you have a medium flex rod that is fine for casting line plus a several flies but when you add up all that non-linear mass, the rod cannot handle it.
You have several problem with all that stuff on the line. False casting and the normal way of extending line don't work. You can't control that thingamabobber and the nymphs. There is mass and there is non-linear mass. A heavier line can still be cast because the mass is evenly distributed along the line. A thingamabobber and heavy nymphs are point sources of mass that disrupt the flow of a cast.
So if you can't add rod load by repeated false casts and lengthening line. You need to increase the load another way and
you need to get the momentum or inertia of the line, thingamabobber, and nymphs at about 180 degrees from where you want the cast to land.
The way you do that is as bhflyfsiher suggested - a water tension cast. You want to use the force of the water flowing downstream to pull against the fly line, thingamabobber, and nymphs. This resistance of the water pulling downstream, creates extra tension to create an extra load on the rod for the upstream cast. You need to create as much downstream resistance as possible to load the rod for an upstream cast. Does that make sense?
At the end of you drift, point your rod downstream at your line and allow the line, indicator and nymphs to straighten downstream. The amount of line that is down stream will determine the extra load BUT it also determines how far the cast will go. If you have too much line, you will not be able to cast it all upstream even with the extra water load. If you have too little, you are limiting the distance cast. So you need to titrate the amount of line, meaning you need to experiment to see what is the optimum amount of amount of line for the maximum load you can use.
In a single smooth motion, cast the line toward your target. Make sure the loop is wide enough so that you don't hit your rod with the indicator or flies. That would be bad. Try a wide loop first and then you can narrow it as you get better at the cast.
The cast is best done at 180 degrees from the the downstream line position. Sometimes the downstream line position will be such that you cannot cast upstream to the point you want to. You can then make the upstream cast as best you can, then immediately pick up and cast back downstream to where your need to to make another upstream cast to your target.
Secondly, you can haul and shoot line on this cast. The amount of line you shoot varies with how effective you are with the water load and the haul.
The effectiveness of the cast varies with the fly rod you are using. Depending on the weight being cast, some fly rods will wimp out. They will not be stiff enough to propel the cast. So give it a try but be careful you do not over stress your fly rod.