Amnesia Leader Material is excellent leader material for butt material. 25lb test is my favorite shooting line to use on a fast sinking fly line. This can also be used as a built in indicator for nymph fishing. The 25lb and 20lb are excellent butt material for leaders as we use these in our Murray's Bright Butt Leaders. The Amnesia mono resists kinking unlike regular mono which will retain more of it's memory (remain coiled). 200ft.