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lead for making bullets

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Old 11-15-2010, 06:12 PM   #21
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Default lead percentages

Well I have gained a lot of info from this site in my short time on it. I have ordered the book as suggested Lyman's cast bullet book, be awhile before it gets here. I have also found a supplier of lead, about 5 hours and two boat rides away. The person I talked to said the have to types of ammo lead one is a 1% tin 6 % antimony the other is a 2% tin -7% antimony. I am shooting a 45-70 sharps so what would be the better lead.
Thanks for the help
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Old 11-15-2010, 06:48 PM   #22
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It depends on the expected velocity. If you are sticking to mild loads in the Sharps, stay with the lower alloy levels.

As a general rule of thumb 2% increase in Tin is equivalent to a 1% increase in Antimony as far as hardness is concerned.

The higher the Tin/Antimony level the harder the bullet. The harder the bullet the faster you need to shoot it for proper results. Harder does not necessarily mean better if you are shooting moderate velocities. Keep in mind the original 45-70 loading 405 gr bullet at about 1400 fps used a pure or nearly pure lead bullet.
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