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Old December 14, 1999, 02:09 PM   #1
Joe Portale
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Join Date: June 8, 1999
Location: Tucson, Arizona Territory
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A friend asked me this question. Glocks have what they call a "polygonal barrel" and cast lead rounds should not be used.

First, What does "polygonal barrel" mean?
Second, I see folks pushing lead with Glocks all the time, so is this statement about not using lead bullets a wive's tale?


Joe Portale
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Old December 14, 1999, 02:45 PM   #2
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Polygonal: A two-dimensional form having more than four regular straight sides.

Doesn't really help much, does it?!?

This is an instance where a picture is worth a thousand words. Grab a bore lite and take a look at your friends Glock. You'll see the difference between it and a regular cut rifling right away.

The Glock barrels tend to build up lead fouling quicker than a regular barrel. The lead fouling if let go too long can cause pressures to rise to unsafe levels.

Many folks do shoot cast bullets in a Glock, but they keep their bores clean.

Good Luck...


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Old December 14, 1999, 05:39 PM   #3
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The reason Glock barrels lead up faster is because their rifling grabs the bullet, instead of cutting in, like regular rifling. Personally, I don't use unjacketed ammo in any of my guns; I just don't like working that hard.

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