This is a discussion on Corrosion of "all copper bullets" within the Defensive Ammunition & Ballistics forums, part of the Defensive Carry Discussions category; I bought some Cor-bon DPX ammo a couple weeks ago and I just noticed today that there is black corrosion on the inside of all ...
I bought some Cor-bon DPX ammo a couple weeks ago and I just noticed today that there is black corrosion on the inside of all the hollow points, but no corosion on the outside. Is this normal with all copper bullets? Is there a way to prevent the corrosion, like spraying them with a little WD40 or something?
I have the Taurus version and there are some dark copper colored spots, seems like tool marks that darkened. I doubt it will hurt anything, probably oxidation darkening. If it was serious corrosion it would be green and you could wipe some out with a Q-tip.
I would not get WD-40 anywhere near my ammo.
the corrosion will give BG's tetanus (probably not) , don't bother to clean em. I doubt the dark spots should hurt anything.
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+1 Not a good idea to use WD-40 unless you want to practice malfunction drills. I wouldn't worry about it unless there were holes all over the place.
There are some black spots in the hollowpoints of most of my DPX. I don't really think its anything to worry about.
Copper oxidizes as a function of being exposed to oxygen.
We all learned this in highschool and/or from walking around in life observing old found pennies and park statues...
Copper is a durable metal resistant to most anything one could throw at it as stored in their weapons cache including humidity over periods longer than ones lifetime.Copper oxidation
Copper is used for pipes, electrical wires, and other building materials. You may have seen buildings with copper roofs. When they are first built, these roofs look like shiny new pennies. As the roofs are exposed to the air and water, an oxidation reaction takes place that changes the color of the cooper. First the copper changes from pink to brown, thin to black. Finally the copper is covered with a blue-green material called patins (puh-TEE-nuh). The patina is made of copper sulfate, a compound of copper and sulfur. Once copper has a patina, corrosion stops and the cooper may lasts for hundred of years. Because it resists corrosion, cooper was used the covering of skim, as the covering, or skin, of the Statue of Liberty. The Statue of Liberty has been exposed to air, water and other forms of Statue of Liberty was restored. Because of its patinas, very little of stature’s skin needed to be replaced. This cooper skin will continue to protect the Stature of Liberty for another hundred years.
Nice post Janq.
Don't worry about copper corrosion on the inside of a HP. If needed, you can carefully use a Brass-Copper cleaner on the case and outside of the Barnes bullet to protect the chamber, throat, and rifling. Try shooting them up before that happens, and keep a few samples ready for the CSI ballistics testing in the worst case scenario.
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Tu ne cede malis, sed contra audentior ito.
("Do not give in to evil but proceed ever more boldly against it.")
-Virgil, Aeneid, vi, 95
So I shouldn't use copper cleaner on my ammo?
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The dark spots you see in the center of the hollow cavity are from the annealing process. Barnes cleans them after annealing and before shipping but sometimes the dark spots in the middle remain. It is not corrosion. It will not have any adverse effects on the ammunition at all.
Last edited by TeamCorbon; September 11th, 2007 at 07:04 PM. Reason: signature
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