Check my math please

[beetle]

Hi All;

I am brand new to casting, and math has not been one of my stronger qualities over the years. I want someone to please check my results for an alloy before I melt it.

If I take 2.33 lbs of a 20 to 1 lead/tin alloy, and melt it with 1 lb of linotype, I project that I will wind up with a 4.7% tin, 3.6% antimony, 91.7% lead alloy.

Question 1: is my math somewhere in the ballpark?
Question 2: if my figures are correct, will this alloy make decent 9mm bullets for low to mid power rounds.

Thank you very much.

John

[John Boy]

John, go to the head of the class ... correct numbers
Q2 - I have no idea because I don't shoot the 9mm caliber

[Echo]

I believe generally we want to have about 2-3 times as much SB as Sn. If you have lino, my suggestion would be to make some 50/50 WW/lino alloy - it would approximate HB from RotoMetals, and would be stout enough for danged near anything. Even 2ww 1lino would be fine.

[David2011]

Hi Beetle,

Welcome! You can get a calculator fir this. Try a Google search for "bullet alloy calculator."

David

[lwknight]

You get 91.70% Lead 3.60% Antimony 4.70% Tin
Perzactly correct. It won't hurt a thing but is more tin than needed.
I find that 9mm is one of the toughest to cast for.
I use 2-6-92 tin/antimony/lead for 9mm

[beetle]

Thanks for all of the replies. I downloaded the "Bullet Alloy Calculator"....awesome program! I am going to melt my first alloy tonight, and will cast my first bullets when my mold lube is delivered. I am really looking forward to this! Again, thanks everyone.

John