What kind of slugs are you casting? The reason I ask is, if they are the traditional hollow-base slugs, not the solid type that fit inside a plastic wad, they recomend only using pure lead, not wheel weights...if that is what you are using for an alloy.
Sometimes you get what you pay for, sometimes you only pay more for what you get.
Three shots are not a "group"...they are a "few".
If the Bible is the literal, infallible, unerring word of God...where are all those witches I am supposed to kill?