After the lengthy discussion we had here a while back about pike leaders, I decided to try heavy fluorocarbon (50 lb test). All fish hit the flies using this shock tippet, including both species of bass. The water was quite clear in some spots and we didn't want to deter any leader-shy fish by using wire.
An interesting observation was that the smaller pike did more damage to the leaders than the larger fish. We had to retie after every one or two small pike, but hardly ever after a fish of greather than 30 inches.