Fast, deep water calls for heavy flies, especially when targetting grayling. As the temperatures start to decrease, the need to get down to the fish increases. I enjoy fishing heavy bugs. OK, it's not summer-evening dryfly fishing, but trundling (sometimes dredging!) bugs through the flows and watching the leader hesitate as the flies are picked up can be alot of fun. Further, it can be very, very effective.
Over the last couple of seasons I have been using tungsten backed shrimps for some of my fishing. Whilst they are not suitable for every situation, they allow you to get deep with a very suggestive imitation. Even a small fly packs the weight - and the larger versions - well they are nothing short of a depth charge. Kick sample the rivers and streams you fish and you'll find the average freshwater shrimp (Gammarus Pulex) is actually pretty small. Therefore, these heavy weight shrimp backs have a place in any river fisher's fly box; especially those early season and grayling fishers.
Hook: Partridge YK4G
Thread; Moser Powersilk 10/0, olive
Legs: Grey squirrel
Ballast: Tungsten shrimp backs.
These are also well worth a swim with pink or olive tungsten backs.