Corrosion forming on rounds in mags

VXTip · April 28, 2011, 22:16

So I was going through mags a couple days ago, loading and unloading some ammo for my range trip saturday and to my surprise, one of the bullets at the top has some blobs of thick green stuff growing on it where it was in contact with the magwell and feed lips. I went through the rest of my mags today, some of them freshly loaded with some shiny new privi partizan I bought off aimsurplus and found more green stuff developing on them too! After some internet searching I discovered this is corrosion eating away at the copper. I ended up unloading all my mags and wiped off every bullet inspecting them to make sure they were ok. Now, arfcom ended up comforting me in regards to still being able to safely shoot it since it only left surface discoloration and no pitting, but this situation did cause me some concern.

As for reasons, the common factor that came to mind for this to be happening in so many mags is that when I first got the mags I used Hoppes 9 to clean them real good since they were filthy and rusty. I put greese on the outside of the mag bodies, the followers and springs, but I dont think I lubed/greesed the inside. So it seems that the hoppes I used to clean the insides has been lingering and eating away ay my bullets, just thought i'd share that with you guys. Any other ideas what could have done it? Only other fluids were preservative gun greese or CLP lube, I doubt those would cause corrosion since their used to protect against it, the mags were left sitting in an open top box in my room btw, not a particularly humid environment (i dont think?)

**def90** · April 28, 2011, 22:19

http://www.corrview.com/tech_p_10.htm

**tdb59** · April 28, 2011, 22:39

Many things can cause verdigris, though I would suspect the Hoppe's in this case. I prefer Hoppe's #9 to clean rifle bores because it does act on copper fouling. I suggest rinsing the mags in acetone, or lacquer thinner, or spray brake cleaner to eliminate all residue.

VXTip · April 29, 2011, 02:24

thanks for the link you got that up fast, ill have to buy some acetone and do that, the hoppes really didnt do much to remove the rust so im gonna have to completely soak them and get scrubbing!

April 28, 2011, 22:16	#1
VXTip Registered FALaholic #: 54560 Join Date: Jun 2010 Location: Indiana Posts: 77	Corrosion forming on rounds in mags So I was going through mags a couple days ago, loading and unloading some ammo for my range trip saturday and to my surprise, one of the bullets at the top has some blobs of thick green stuff growing on it where it was in contact with the magwell and feed lips. I went through the rest of my mags today, some of them freshly loaded with some shiny new privi partizan I bought off aimsurplus and found more green stuff developing on them too! After some internet searching I discovered this is corrosion eating away at the copper. I ended up unloading all my mags and wiped off every bullet inspecting them to make sure they were ok. Now, arfcom ended up comforting me in regards to still being able to safely shoot it since it only left surface discoloration and no pitting, but this situation did cause me some concern. As for reasons, the common factor that came to mind for this to be happening in so many mags is that when I first got the mags I used Hoppes 9 to clean them real good since they were filthy and rusty. I put greese on the outside of the mag bodies, the followers and springs, but I dont think I lubed/greesed the inside. So it seems that the hoppes I used to clean the insides has been lingering and eating away ay my bullets, just thought i'd share that with you guys. Any other ideas what could have done it? Only other fluids were preservative gun greese or CLP lube, I doubt those would cause corrosion since their used to protect against it, the mags were left sitting in an open top box in my room btw, not a particularly humid environment (i dont think?)

April 28, 2011, 22:19	#2
def90 Old Fart Silver Contributor FALaholic #: 50609 Join Date: Nov 2009 Location: The Peoples' Republic of Boulder, Colorado Posts: 8,807	http://www.corrview.com/tech_p_10.htm __________________ There is no theory of evolution, just a list of creatures Chuck Norris allows to live. Public libraries cannot let the public decide what is allowed in the library, or it would be brimming with pornography and gun magazines.

April 28, 2011, 22:39	#3
tdb59 Curio & Relic Bronze Contributor FALaholic #: 63177 Join Date: Mar 2011 Location: I am here Posts: 2,253	Many things can cause verdigris, though I would suspect the Hoppe's in this case. I prefer Hoppe's #9 to clean rifle bores because it does act on copper fouling. I suggest rinsing the mags in acetone, or lacquer thinner, or spray brake cleaner to eliminate all residue. __________________ "I've SEEN the future. Do you know what it is? It's a 47-year-old virgin sitting around in his beige pajamas, drinking a banana-broccoli shake, singing "I'm an Oscar Meyer Wiener".

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April 29, 2011, 02:24	#4
VXTip Registered FALaholic #: 54560 Join Date: Jun 2010 Location: Indiana Posts: 77	thanks for the link you got that up fast, ill have to buy some acetone and do that, the hoppes really didnt do much to remove the rust so im gonna have to completely soak them and get scrubbing!