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Old 08-06-2011, 09:40 PM   #1
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Default My Lee Tumble Lube cast bullets are too big

I thought these could be used without resizing.

I was getting bulges in the cases, and when I checked the bullets with a micrometer, the base (the last ring) was slightly bigger than the rest of the rings/bullet. For example, the .357 was .357-.358 in diameter until the base, which was .360-.364.

I thought maybe a defective mold, but I checked the 9mm version of the same mold, and it had the same problem.

Have I done something wrong?

Here is the mold I used

Lee 6-Cavity Bullet Mold TL358-158-2R 38 Special, 357 Magnum, 38 Colt New Police (358 Diameter) 158 Grain Tumble Lube 2 Ogive Radius

Thanks in advance for any insight.



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Old 08-07-2011, 06:32 PM   #2
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What alloy are you using? Believe it or not different alloys have different shrinkage rates.



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Old 08-08-2011, 01:18 PM   #3
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Quote:
Originally Posted by robocop10mm View Post
What alloy are you using? Believe it or not different alloys have different shrinkage rates.
Generally, 90% wheel weights, 5% tin, 5% antimony
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Old 08-08-2011, 01:29 PM   #4
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Sounds like you have run full speed into Lee QC. They make some good and inovative products, but the TL series of bullet molds is not one of the better idea. Send it back and ask for one that is made correctly.

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Old 08-08-2011, 07:34 PM   #5
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A purer lead alloy with produce a heavier bullet with a smaller OD. However, having the bottom lube groove a different diameter sounds bad.
Call Lee and talk to them. If you bought from MidwayUSA, talk to them.



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