WW + Tin vs Lyman #2

[Ken in Iowa]

How much will 30 cal Boolits gain in diameter by switching from WW + 1 or 2% tin to Lyman #2?

[Le Loup Solitaire]

You can find related information on this by searching for the "Terracorp formula" which has been used by Saeco to show that effect of tin and antimony in alloys for diameters and weights depending upon percentages used. LLS

[scottfire1957]

Excuse my ignorance, which is bountiful, but if you size your bullets, what difference does it make?

[MSD MIke]

if you need a .310 and your bullet drops at .309 it matters:)

[scottfire1957]

if you need a .310 and your bullet drops at .309 it matters:)


He's asking about a GAIN in diameter. RIF.

[Ken in Iowa]

You can find related information on this by searching for the "Terracorp formula" which has been used by Saeco to show that effect of tin and antimony in alloys for diameters and weights depending upon percentages used. LLS

Boy, I can't find that LLS. I Googled a reference at the Redding site that is no longer available. Many other links point to posts by you. :)

I was looking to gain about .001" on boolits that drop .313" now. I'll give it a spin and see how it works.

[dondiego]

Try a search for "Beagling".

[typz2slo]

I have been seeing around 2.65-2.73% antimony in my cowws and no tin at all. I got my hands on some pewter that is 93.17% tin and 4.77% antimony to mix in with my coww mix.

[w30wcf]

Ken,
.0005"-.001" increase in my experience.

w30wcf

[Ken in Iowa]

Ken,
.0005"-.001" increase in my experience.

w30wcf

Thanks brother.

Ken, aka Hans Christian SASS #64074

[bhn22]

You can add 2% tin to a lead based alloy, and it may increase the "as cast" bullet diameter slightly, depending on the actual base alloy. It accomplishes this by lowering the surface tension of the alloy as it fills the mould, and by slightly retarding oxidization of the alloy as it pours. It sounds a bit silly, but it is true. I always suggest the following article to casters who want to learn more about the properties of lead alloys and the effects of "additives". Many don't really care, they just want an instant answer. It's from CBRicks website, who sadly, has been absent from this forum for some time. http://www.lasc.us/CastBulletAlloy.htm

[Ken in Iowa]

You can add 2% tin to a lead based alloy, and it may increase the "as cast" bullet diameter slightly, depending on the actual base alloy. It accomplishes this by lowering the surface tension of the alloy as it fills the mould, and by slightly retarding oxidization of the alloy as it pours. It sounds a bit silly, but it is true. I always suggest the following article to casters who want to learn more about the properties of lead alloys and the effects of "additives". Many don't really care, they just want an instant answer. It's from CBRicks website, who sadly, has been absent from this forum for some time. http://www.lasc.us/CastBulletAlloy.htm

I read that again this morning. Good stuff!

[Larry Gibson]

Ken,
.0005"-.001" increase in my experience.

w30wcf

+1.

Larry Gibson