I just cast my first batch of hard alloy, following the Lyman No 2 recipe, 4500g of Lead 250g of Tin and 250g of Antimony. I've achieved 16 BHN and cast using the Lee TL358-158-SWC mould.
They look good and I have sized them at .358" pre-Powder Coating and will resize to 358 after coating. These will fly at around 950 fps from my Henry Big boy.
My question is this, do they need to be this hard?