fiver
Well-Known Member
the foster slugs are probably [more likely] swaged and not cast.
I know Hornady uses 5% antimony in their swaged handgun bullets and sierra used to use 3% antimony and nothing else.
tin in swaging makes things more difficult on the equipment but does have down range uses.
it's not something I'd want to try at home without some super fancy foot work.
anyway what happens is the higher antimony content actually makes the swaging easier because the antimony crystals break down and this allows the lead to extrude and flow easier.
they aren't tied up in any bonds or chains so are pretty much just floating around within the pure lead.
I know Hornady uses 5% antimony in their swaged handgun bullets and sierra used to use 3% antimony and nothing else.
tin in swaging makes things more difficult on the equipment but does have down range uses.
it's not something I'd want to try at home without some super fancy foot work.
anyway what happens is the higher antimony content actually makes the swaging easier because the antimony crystals break down and this allows the lead to extrude and flow easier.
they aren't tied up in any bonds or chains so are pretty much just floating around within the pure lead.