93/7 lead tin

[jkoper]

I have 93/7 bars I can get from work, what can be added to make a good alloy


Thanks
Jim

[Hickory]

If it's 93% lead and 7% tin you need to cut it with a little more lead.
If it's 93% tin and 7% lead you'll only need to use small amounts to lead get good boolits.

[youngda9]

add equal parts of straight lead to cut the tin content in 1/2. Might want to add more than that...like 2X straight lead to cut it down to 2.33%.

[KYCaster]

That's pretty close to 16:1, so you could use it as is for BPCR boolits.

You could also cut it with pure Pb to get 20:1 or 30:1.

Jerry

[Chill Wills]

KYCaster sure has it right.
What cartridge are you going to be casting for? The rifle/handgun you will be loading for will suggest your alloy needs. I would guess that you are not a BPCR rifleman by your question.

If we lived close to each other I would make a trade for some alloy I have that would be ready to go for you.
Maybe someone in your area would like to have your alloy as it is and would trade if you posted it in the Buy/sell/trade area. That might save you some trouble and help someone else out.
Just a thought.

[runfiverun]

generally the first number is tin....
if it's 7% tin i'd mix 8-10 lbs of it to 40 lbs of ww's and call it good.

[jkoper]

sorry I wasn't clear it is 93 lead 7 tin. I will be casting for 357 pistol and rifle and 35 rem.Would mixing in chilled shot add enough antimony to harden it sufficiently?


Jim

[runfiverun]

most of the smaller sizes of magnum shot have 5-6% antimony in them.
if you mixed things 50-50 say 10 lbs of each you'd have either a 3.5/3.0/93.5 or 3.5/2.5/94 alloy just a bit tin rich.
something like 1 part to 2 parts of the magnum shot would make some decent boolits.
close to 2/4/92 alloy. you'd be happy with that.

[220swiftfn]

One thing to keep in mind is that your alloy is 1:16 as it sits. This was Elmer Keith's "hard" alloy for his heavy .44 Specials (which is now the standard loading for the .44 Magnum) and should also work admirably in the .357. Personally, I'd keep it as-is, you can always add pure to it for a softer alloy (say 1:20 or 1:30) and if you use it for hunting, hollowpoints hold together better without the antimony.....(generalization, I know, but *with* antimony in the mix, the numbers have to be "just right") Add to that the known quality of the alloy that you have, I'd further suggest that if you're thinking of adding antimony, why not trade for what you want???



Dan

[Finarfin]

I run 30:1 at 1800 fps gas checked out of my 32-40 with excellent results. I think people go too hard sometimes.