I can't speak for the other guy, but I run 10lb main, with 18 inches of lead. I run no shot on my leader, and I don't use shot lines. Line, swivel, leader and that's it! Never made a difference to my catch rate. Before fluorocarbon we used to run 6-8lb main and 3lb leads consistently in clear water, occasionally dropping to 2lb in the clearest conditions. Nowadays I can practically yank fish out of the water... LOL! If you use clear lines, you don't need shot lines, they are just another pain in the ass!