Good casting session today

Discussion on Bullets and Bullet Lubes, Casting, Swaging, Paper Patching, and Lube Cookies.
TexasMac
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Good casting session today

Post by TexasMac » Thu Apr 25, 2019 11:44 pm

Getting ready for the upcoming Texas State matches. I believe I’ve got the casting technique pretty well figured out. Now if I can only shoot as well. The 140 bullets are from a BACO JIM410410M1 mould for a Browning .40-65. I have been using 16:1 alloy for some time but thought I’d try 20:1 for a change to see what happens. Based on a specific gravity test these are actually 21:1.

Wayne

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NRA Life (President's Council) Member, TSRA Life Member, NSSF Member
Click on http://www.texas-mac.com/index.html to my home page containing information on my Browning/Winchester BPCR book & associated articles.

Plainbase
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Re: Good casting session today

Post by Plainbase » Fri Apr 26, 2019 3:07 pm

Wayne, was your alloy 20:1 or 20 to 1? 20 to 1 would give you a proportion of 21:1. 20:1 yields 20 pounds of alloy containing 1 pound of tin vs 20 to 1 which yields 21 pounds of alloy containing 1 pound of tin.
Plainbase

TexasMac
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Re: Good casting session today

Post by TexasMac » Fri Apr 26, 2019 4:14 pm

Plainbase wroteCOLON
Fri Apr 26, 2019 3:07 pm
Wayne, was your alloy 20:1 or 20 to 1? 20 to 1 would give you a proportion of 21:1. 20:1 yields 20 pounds of alloy containing 1 pound of tin vs 20 to 1 which yields 21 pounds of alloy containing 1 pound of tin.
Plainbase,

It's 20:1 by weight or in this case actually 21:1 by weight meaning an alloy containing 95.5% lead and 4.5% tin my weight. Therefore 10lbs of 21:1 contain 9.55lbs of lead and 0.45lbs of tin. 10lbs of 20:1 contain 9.52lbs if lead and .48lbs of tin.

BTW, by my definitions:
20-1, 1-20 (1 in 20) all imply 95.0% lead & 5.0% tin
1:20 (1 to 20), 20:1 (20 to 1) all imply 95.2% lead & 4.8% tin

Wayne
NRA Life (President's Council) Member, TSRA Life Member, NSSF Member
Click on http://www.texas-mac.com/index.html to my home page containing information on my Browning/Winchester BPCR book & associated articles.

Bakebfr480
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JoinedCOLON Sun Jun 17, 2018 5:09 pm

Re: Good casting session today

Post by Bakebfr480 » Sat Apr 27, 2019 5:51 am

Where and when are the Texas state matches?

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