We've been experimenting with this type of set up for 3 seasons -please note it is banned on a number of Spey Beats and other places where the intermediate and ally's is still cutting edge
so check first
Observations:
Best fished with a shooting head, I use anything in a sink range of Type III - VIII depending on the water (I have tried it on a Teeny, but it doesn't seem to work so well)
Leader - I'd use 1.5 ft because the line is below the fly and any longer makes it hard to control the fly - if you use less than 23lbs Seagur there will be
becuase the leader is far more exposed to rocks and ledges
Flies - we use the popper heads for bodies and a fox/marabou tail. These are good because you can make them like a tube or simply put a single hook through them. Colour in with marker pens and then put a couple of layers of hard as nails over them and you have a very durable fly. So far have only tried flies about 1 1/2" plus tail. Not sure how the smaller versions or bigger ones would work, but no reason why not.
If you invert them they swim like a Kynoch and are deadly....
but definitely check whether you beats considers them flies
....eh...Southpark Kenny (the future state of salmon fishin' KC and the Sunshine band luv a bit of that)
Style of fishing obviously depends on the water you are fishing. The shooting head gives you the flexibility to feed out slack to get depth. Rather than go through all the permutations of where you should cast, how far and at what angle, I thought it would be easier to focus on what you are trying to achieve.
There are two main approaches. Either you are trying to hover the fly in front of salmo's neb two inches from him (like in Czech Nymphing) or you want to suddenly flash the fly across his sight plane (Like a diving Rapalla). I like to think of salmon as kittens with a piece of wool. Let it sit in front...arouse curiosity....suddenly pull away...pounce
Whichever way you are going to have to work the fly and fly line. I will say this method suits pools best where the fish are spread across it as it gives you time to work the fly. If the fish are hard on the far bank this method doesn't really work because you don't have the time for the fly to get in the fuishies window (there are much better ways of covering these fish).
Takes - so far the salmon have walloped the fly, unlike in Czech Nymphing where you can have some very gentle takes indeed.
Finally, this method works at any time of year, but comes into its own for low water fishing in summer and early autumn.
Good luck, and you will need more patience to master this because you need to know exactly where the fish are and also depth, speed of current, obstructions etc. It's also very hard work...so I only resort to it after my tactical kip....
I look forward to hearing how you get on.
Now as it is the mother of all Sundays, better do my duty.
Later fuishies
CLaG