I know of Rotometals, but I'm sure there are others.
Who, and where might they be?

Ebay...

How about here? I don't know if the do non commercial sales, but if you ask, they may point you to one of thier customers that does.

[email protected]
Santa Rosa Lead Products
(800) 916-LEAD (5323) Fax: (707) 431-1749

33 South University Street
Healdsburg, CA 95448
3949 Guasti Road, Unit B
Ontario, CA 91761
Serving California, Alaska, Arizona, Hawaii, Idaho, Montana, Nevada, New Mexico, Oregon, Utah, Washington.

I went to a local scrap yard and purchased what they called lead.
the stuff is so hard there is no way that it is lead may be 10% if that.

I went to Rotometals and purchased lead pgs and add a very small amount of the stuff I got from the scrap yard to harded to what I need.
Gunna take about a hundred years ti mix all the hard stuff I have.

Scrap yard stuff can many times turn out to be mystery metal, if it looks like lead and is heavy like lead then it's lead to them. Years ago I bought some aluminum angle from a scrap yard it has some kind of OD green military coating on it. The stuff was harder than woodpecker lips, same thing with some stainless steel material. Hardest stainless I ever tried to machine.

True that! I've got some scrap yard "lead" that is soft like lead, wieghs almost as much as lead, but takes the heat of a cutting torch to melt it. No idea what it is. It's shaped like it might have been a bearing race for a huge shaft.

The deal with getting good scrap yard lead is to only buy source lead of a known alloy. If you buy lead sheathing or lead pipe, you know you are getting nearly pure lead. Clip on wheel weights are another source of lead of a known alloy.

Don

Most of my lead came from lead wheel weights smelted down and cleaned up, then cast into Lyman ingots. I do manage to pick up some pure soft lead at times and I also have tin and other stuff around to harden it if needed.

eBay is good source for lead and lead wheel weights (if you can get them) are a good plan B.

Zip metals

http://zipmetals.com/Bullet-Casting-Metals_c_44.html

Probably some kind of babbit bearing alloy of which there are too many to count. May well have large amounts of copper in the mix which would explain the high melt temp. Do the resulting bullets have a kind of purplish hue to them?

I check tire shops for wheel weights.

A buddy and I bought a couple tons of recovered bullets from an indoor range. Smelted out the lead and sold the copper to a recycler. It's harder than I thought it would be. I also bought a bunch of pure lead from a guy who bought a lead lined x-ray booth.