Why we use copper layer over lead?

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Published on June 13, 2025 7:59:02 AM ● Video Link: https://www.youtube.com/watch?v=EXtffTasULI

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About video :- Why we use copper layer over lead?
🔫 Why Bullets Use Copper:
Bullets are typically made of lead cores but are jacketed (coated) with copper or copper alloys. Here’s why copper is used:

✅ 1. Soft Enough Not to Damage Barrels
Copper is softer than steel but harder than lead.

It reduces barrel wear and prevents the lead from smearing inside the barrel (called fouling).

✅ 2. Lubrication & Heat Resistance
Copper handles friction and heat better than bare lead.

When a bullet travels through a barrel at supersonic speeds, it heats up — copper keeps things smoother.

✅ 3. Reliable Expansion
In hollow-point or expanding bullets, a copper jacket helps control how the bullet mushrooms on impact, improving damage and stopping power.

🟡 Do We Use Brass Too?
Brass is mostly used in cartridge cases, not bullets themselves. Here’s why:

✅ Why Brass for Cartridge Cases?
Brass is a copper-zinc alloy.

It's:

Strong yet malleable (seals the chamber when fired, then springs back to make ejection easy)

Corrosion-resistant

Easy to reload


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