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The Range
Ammo & Reloading
were to buy some tin
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<blockquote data-quote="Dumpstick" data-source="post: 3279183" data-attributes="member: 41653"><p>generally, I use tin (Sn) at a rate of about 1-2% by weight, and then only to help fill out the mould. The tin helps 'wet' the lead, allowing it to flow better.</p><p> The Linotype mixture is very hard, roughly 22 Brinell Hardness (Brinell is a standard measurement), and many people these days (myself included) don't subscribe to the notion that it takes a very hard bullet to shoot lead well. That being said, if one wished to shoot at jacketed velocities with lead projectiles, a straight Lino bullet helps.</p><p> The problem is that all the Sb (Antimony) in the Lino makes the bullet brittle, and when impacting bone in a hunting situation, the bullet will often shatter. Many people hunting with lead will go with a softer bullet and a lower velocity to allow the bullet to stay together and penetrate. In this situation, the Sn (tin) allows the bullet to expand to an extent (mushroom, if you will), but needs a somewhat higher ratio to really make a difference.</p><p> In black powder days, bullets would be anywhere from 1-30 (Sn to Pb) to 1-10. Most used a 5% Sn mixture, called "20 to 1", it's actually 19 parts Pb and 1 part Sn. That 5% would somewhat harden the lead, but still allow the bullet to obdurate (swell up) in the bore to seal it.</p><p> </p><p> I use a fairly soft bullet in my 7.62x54r shooting, just straight Clip On Wheel weights, + 1% Sn. this gives me a Brinell Hardness of about 12-13. It's fine for the relatively low velocity I shoot, about 1700fps.</p><p> If you are worried about effectiveness, that 7.62x54r bullet - 215 grains at 1700 fps - will probably travel thru a deer end to end.</p></blockquote><p></p>
[QUOTE="Dumpstick, post: 3279183, member: 41653"] generally, I use tin (Sn) at a rate of about 1-2% by weight, and then only to help fill out the mould. The tin helps 'wet' the lead, allowing it to flow better. The Linotype mixture is very hard, roughly 22 Brinell Hardness (Brinell is a standard measurement), and many people these days (myself included) don't subscribe to the notion that it takes a very hard bullet to shoot lead well. That being said, if one wished to shoot at jacketed velocities with lead projectiles, a straight Lino bullet helps. The problem is that all the Sb (Antimony) in the Lino makes the bullet brittle, and when impacting bone in a hunting situation, the bullet will often shatter. Many people hunting with lead will go with a softer bullet and a lower velocity to allow the bullet to stay together and penetrate. In this situation, the Sn (tin) allows the bullet to expand to an extent (mushroom, if you will), but needs a somewhat higher ratio to really make a difference. In black powder days, bullets would be anywhere from 1-30 (Sn to Pb) to 1-10. Most used a 5% Sn mixture, called "20 to 1", it's actually 19 parts Pb and 1 part Sn. That 5% would somewhat harden the lead, but still allow the bullet to obdurate (swell up) in the bore to seal it. I use a fairly soft bullet in my 7.62x54r shooting, just straight Clip On Wheel weights, + 1% Sn. this gives me a Brinell Hardness of about 12-13. It's fine for the relatively low velocity I shoot, about 1700fps. If you are worried about effectiveness, that 7.62x54r bullet - 215 grains at 1700 fps - will probably travel thru a deer end to end. [/QUOTE]
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