Try the Yahoo bullet casting group, perhaps they will be able to help you.
It is CB-L@yahoogroups.com
Here in the UK the alloy is 96%lead and 4%
antimony (there is supposed to be a small amount of tin present, but usually
gets lost in the re-cycling). Chatting to some of the American bullet
casters there are various tales of wheelweight alloy running from 3% to 5%
antimony. You could always cast something in it, then weight the casting in
air and then suspended in water to calculate it's specific gravity and work
backwards from that to find the ration of the antimony and the tin.
----- Original Message -----
From: "Daniel C. Postellon" <postello@...>
Sent: Monday, March 03, 2003 12:07 PM
Subject: Re: [hobbicast] lead/antimony
> I was told last night by a bullet caster that the alloy has been changed
> the US. He didn't know what it was, but it melts at a higher temperature.
> Any clues as to what this might be? Dan P
> ----- Original Message -----
> From: "john grant" <grantjoh@...>
> To: <email@example.com>
> Sent: Sunday, March 02, 2003 3:50 PM
> Subject: Re: [hobbicast] lead/antimony
> > There may be some antimony to harden them but I can see no reason to use
> more expensive metal when lead will do.
> > "Brent " wrote:
> > > Are automotive wheel wieghts made from lead as everyone thinks, or
> > > antimony, which I was told by someone?
> > > Brent
> > >