Yup that?s for lead, I cut it out of an old catalog a while back and threw it in with my tying stuff.
Brass is lighter, and it weighs about 40% less than lead, or roughly half as much.
Tungsten is heavier, and weighs about 40% more than lead. or roughly 1.5 times as much
Bismuth, which is often used as a non toxic substitute weighs about the same as lead.
So a new chart. thanks to Excel, would look something sorta close to this using 40% difference for lead. It?s kinds interesting to see how the different size dumbbells compare.
Diameter Brass Lead/Bismuth Tungsten
Midget 1/16? 1/333 oz 1/200 oz 1/140
Micro 3/32? 1/200 1/120 oz 1/85
Mini 1/8? 1/133 1/80 oz 1/57
X-small 5/32? 1/100 1/60 oz 1/42
Small 3/16? 1/67 1/40 oz 1/29
Medium 7/32? 1/50 1/30 oz 1/22
Large ?? 1/33 1/20 oz 1/14
X-Large 9/32 /17 1/10 oz 1/7
I suppose actual weight will vary a little between manufacturers depending on the purity of the metal and machining (some might be in mm instead of inches) and whether it?s plated with nickel etc, but it?s a rough guide.
As far as regs go, it?s always wise to check. Some waters may ban lead of any kind, especially water on land managed for waterfowl and the list seems to be expanding. l
Some special trout areas around here ban weight of any kind, though that?s often unclear as to whether that includes small beadhead nymphs or just split shot on the line. But using something like a clouser there is likely to might get you in trouble.
peregrines
PS Sorry the formatting screwed up. Looked good in the editor, but got scrunched when posted. You could probably cut and paste it into a Word doc and reformat with the space bar to make it more legible.