I don't know if I bought the wrong little crimp on sinkers. I fish tandem nymphs and cant keep the sinkers froms sliding down to the tag or any knot on the line. How the heck do you do it?
I've used a number of brands, that did that (especially tin shot). Putting the shot, right above the knot helps. I also use flurocarbon, which tends to stick a little more than mono.