Copper Bullets - How Pure?

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HGM22

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Does anyone know the copper-content of all copper bullets? I'm assuming they are alloys of mostly copper, but also antimony, tin, etc.
 
Spent most of the last thirty years designing and fabricating copper (usually 11000) bus bar systems for everything from hydro dams and steel mills in the U.S. to oil pumping stations in Saudi Arabia & Kuwait.
Copper is copper, and if it's isn't, it's called an alloy.
That being said, I sure can't speak to just how honest bullet manufacturers are, I just assume when they say copper, they mean copper.
 
Copper Bullets - How Pure?
Does anyone know the copper-content of all copper bullets? I'm assuming they are alloys of mostly copper, but also antimony, tin, etc.
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What a wide open question. First why do you want to know?

Barnes are pure copper, no other metals added to make it an alloy.

If you're also asking about Hornady GMX, that stands for Guilding Metal Xpanding. that means the bullet is made entirely of guilding metal, IOW (the metal in all bullet jackets), copper jacketed bullets.

Nosler makes the E-tip which is the same metal that Hornady uses in their GMX, guilding metal. Both Hornady and Nosler use a plastic tip to initiate expansion.
 
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