The reason for the site being so named is I am a professional metallurgist, 50 years of practice and enjoy discussing the metallurgy and casting of the metals used in bullet casting and making the alloys.
Antimony has always been the difficult metal to obtain and then alloy due to the high melting temperature of the metal. Over the years the sources have been linotype, smelted wheel weights (WW) and as a last resort magnum grade high quality small shot.
Some years ago I started using a corrosive salt flux and finely ground antimony, which was not really satisfactory as both the antimony dust and the fumes and smoke from the flux was toxic.
Through a very fortunate set of circumstances I obtained a very low temperature flux that does not smoke, smell or flash and is non-toxic. It requires clean sized antimony without fines and dust and is safe in electric casting pots as well as gas fired pots with proper temperature control, (thermometer is best but not absolutely necessary.)
Tin, lead, antimony and alloys of lead/tin for BPCR shooting, eutectic linotype and any custom specification alloy are all available.