The last time I used the mould after cleaning it I loosened up the sprue plate and it seemed to cast alot better. I flux the metal when I mould and have a RCBS thermometer that I get up to around 750-800 and the wheelweights flow pretty good in all my other moulds. The holes in the sprue plate are the same as in my older mould like my 358156 HP that can't ever seem to drop out a bad bullet, the same with my 358242. Both of those are older single cavities and casting with them is a pure joy.

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Vaya con Dios