Just purchased a used 38 HBWC 148 grain mold and am trying to decide what alloy I should use to cast boolits in it. Some research on the forum yielded a couple of ideas.
3 parts pure (roofing lead) + 1 part clip on WW & add about 0.1% tin. (is that really 1/10 of 1 percent?)
50/50 Plain/COWW + 1 % tin.
I'm clear that these need to be soft to perform well, but how soft? I also have some solder and was considering a 20:1 Pb/Sn mix. Or something along those lines.
My first choice for lube is 45/45/10 tumble lube. I could also powder coat shake and bake but I fear that some powder could clog the hollow base.
At this point I'm looking for what lead to cast them with but I won't ignore any 38 special loads for a snubbie, or a 357 magnum loads that folks want to suggest. I have Unique and Titegroup in good supply, I also have a little bit of Red Dot and Green Dot available.