best place for lead wire for bullet making.
Here's an alternative if you can't find a supplier.
You can cast cores then swage them to proper weight.
corbin makes a gang mould for just this purpose. Or if your handy you can
get a small caliber lee mould and drill it out to 188 to 196 for 6mm.
22 takes 188 wire 196 work better for 6mm. . try to use pure lead , forget wheel weight, {they have to much other material mixed in.
You should have just about zero waste this way. yes it's time consuming but it does work very well. The shipping cost are the killer. so try to buy it locally. I live in new york state and am lucky enough to be with in 80 miles of a lead manufacturer. I pick up my own, usually i buy 300 lbs at a time. wait till the price goes back down if you can. It hovering at over $2 a pound.