Originally Posted by
Rickf1985
If you are using the bullet alloy calculator from Bumpo on here I am pretty sure it tells you somewhere in that program that since it is an Exell program it is not going to give exact results down to the tiniest degree. It is a guide. Excell is a word program, not specific math program. It is not designed to do complex math. If you want to get that exact in your alloy you really should be doing the percentages by hand using real math. And also using KNOW alloys from a foundry like Rotometals. Using things like solder and wheel weights and linotype and expecting to get a known result from an XRF test just ain't gonna happen! You have no idea what is in any of those mentioned alloys other that what is published in old books or what you were told on a forum.