Antimony alloy?

[sutherpride59]

So for the last year I have been using water dropped 50/50 pure lead/COWW for my 45acp. Well I'm out of clip ons and can't get ahold of any but I do have close to 120lbs of pure lead. I just spend the last 30 minutes trying to figure out how to get between 12-16bhn out of pure lead alloyed with rotometals super hard alloy. My best guess is 3lbs of pure lead and 1 lbs of super hard and water dropped should get me there with about 8% sb. Are my numbers way off? Please somebody smarter than me help lol.

[Yodogsandman]

http://www.lasc.us/SuperHard.htm

[Grmps]

Buy some COWW form the Captian I think it's basically $1 pound + shipping and stay with what you know.
You could go 2 parts pure to 1 part COWW and end up with 9.5 bhn which is plenty for 45 ACP

[runfiverun]

8% antimony is more like 18bhn.
3% antimony is more what your looking for. [for @ 11bhn with a little tin added]

you been running probably 1.25-1.5% with your 50-50 mix.
after waiting them out a month or so after water dropping your getting your 15-16 bhn.

[sutherpride59]

8% antimony is more like 18bhn.
3% antimony is more what your looking for. [for @ 11bhn with a little tin added]

you been running probably 1.25-1.5% with your 50-50 mix.
after waiting them out a month or so after water dropping your getting your 15-16 bhn.

I thought without the arsenic that I would have to double down on the antimony. You are correct though, when I water drop them I cast close to 2,000 at a time over a long weekend so they do get to age harden a lot. I will try the 3% added and see what happens. I'll order some this weekend and see what happens. Thanks for the help y'all.

[runfiverun]

the grain refiner will help you get more BHN air cooled or water dropped.
you can replace the arsenic with some sulpher.
your looking at .1-.2 type numbers but they do kick in about 2 BHN when combined with the antimony.
remember BHN isn't the end all.