Im just getting into casting and working on making 9mm boolits for my Glock17 size Polymer80. I have collected about 200 lbs of range scrap that I believe is around 10-11 bhn. I used artists pencils and fingernail test as my scientific means of coming up with that #. It is my understanding that 15 bhn or so is needed for 9mm. I ordered a 5lb ingot of superhard from Rotometals that should arrive today, and i bought a 17oz pewter tray from Goodwill for $2. I cant get any of the calculators to work on my old Ipad. Im not sure what % lead/tin/antinomy will get me to 15bhn. Ive looked through the stickies but cant quite figure this out.