I do like tungsten beads but not all of my stock is tungsten. I use what I have and when I run out I get more. As I am running out of beads of various sizes I am generally replacing with tungsten as long as I can get the color and finish I want. I use the size bead that looks right for the hook I'm tying on. I'm pretty loosey goosey about this stuff. Since I tie these on short shank curved hooks I don't do too many 16s. Not for Western Washington trout like I think we're talking about. When the water levels drop I pretty much go dry fly only.