Hi,
I want to start casting my own bullets and want to understand what to shoot for in terms of BHN and what alloy mixture gets me there. I am looking to cast 9mm Luger 115gr for simple paper punching.
My plan is to start by casting a pre-mixed alloy and then later on start sourcing pure metals and mix myself. This should make things a little easier for me until I am comfortable starting from scrap.
My specific questions are:
1. What is the BHN or range of BHN appropriate for what I am trying to make?
2. Do I need to pick an alloy with all three metals: lead, tin, and antimony?
3. Which one of these alloys is best for what I am trying to make: https://www.rotometals.com/bullet-casting-alloys/
I think I can figure out #3 based on the answers to #1 and #2 and the formula on the rotometals site: Brinell = 8.60 + ( 0.29 * Tin ) + ( 0.92 * Antimony ) but would still welcome your thoughts.
Thanks
-John