Tips for making a harder lead alloy.

GcG166

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I have about 40 pounds of soft lead and a pound of tin for casting. Wondering what is a good mixture or if i should get anything else to add for casting 350 gr for a 45-70. Any other suggestions for someone new to casting would also be great
 
if it is pure lead ..... it will not harden with out adding tin and Antimony

if it is wheel w you can add a bit of tin and water drop

or trade it to a black powder guy for something closer to what you need

you can do the pencil test to tell you how hard it is
 
Never heard if the pencil test method. Ill give that a try tomorrow and see exactly what it is i have here

About what percentage of lead/tin/Antimony is suggested
 
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You could make 20-1, about 10BHN, as opposed to 5BHN for pure lead. 20 pounds lead to one pound tin.
I've used 20-1 for 45-70. Great alloy to cast with. Good for moderate velocity in that caliber. If you want to crank up the speed, antimony will be helpful. Keep it under 1500FPS or so and 20 to 1 will work very well. Also you could consider powder coating the bullets, as it allows a bit softer alloy, and greatly reduces the chance of leading the bore.
You don't need super hard bullets for the 45-70.


Stomp
 
You can get another pound of tin in the form of no lead solder, and have enough to alloy the whole batch. Expensive, but easy to find at any decent hardware store.
Good luck.
Stomp:cheers:
 
Add tin to lead to make the melt a bit more "runny" - fills out the little grooves in the mould better, while keeping melt temperature down in more "normal" casting range. But you need antinomy - as mentioned above - to be able to make the lead hard by "water drop" method. From local scrounging, much easier to find wheel weights, than it is to find pure lead - at least out here in rural small town Manitoba and area. Might want to save or sell that pure stuff rather than use to make an alloy?
 
I ran into a large lot of pure lead once and hardened it very easily with lead shot for reloading. It was very high in antimony and had a bit of tin as well. In order see the benifit of adding it you have to water drop them but that’s how I made my 300gr 460 Mag Bullets until I replenished my COWW’s.

hardness went from 6 BHN to 24!
 
From what im seeing here i think ill take a few pounds and play with changing the hardness and cast a few for low speed rounds and see if i can make a trade locally for someone for wheel weights.

I did have a source for wheel weights and lots of them melted to ingots. Then i moved to a different province
 
I’m driving the LEE #90373 340 grain SWC flat nose bullet around 1600 fps. Using a medium hard cast powder coated bullet sized to .459, its about a 11-12 BHN. Marlin model 1895 lever in 45-70.
The bullet is indoor range lead with a bit of pewter mixed in, to be exact, its 5 mimi-muffin ingots with a mini-muffin wafer added.
If. I do my part, its pretty accurate. Tuck in hard or get the nasty recoil sting.
 
What a pain in the ass it is sourcing stuff to harden lead. Everyone is far enough for shipping to be an absolute killer. I called every scrapyard in driving distance. Nada...
 
I added some tin and looked into the hardness testing with drawing pencils. Seems to me that it will be usable for my uses with my 350gr with no gas checks.

Ill update later with what im coming up with for hardness
 
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