Green Residue

montelores · September 26, 2009, 09:59 PM

While cleaning a new, unfired (by me) S/S revolver prior to its first use, the used cleaning patch came out of the barrel with a green color on it. I was cleaning with Hoppe's #9, and that must have occurred with 10 patches, until no color was discernible. Then a light swab with oil.

I have not seen this before now. What don't I know?

Thanks, Monty

ac700wildcat · September 27, 2009, 04:52 AM

Thats the color that copper fouling turns to when cleaning solvents eat away at it. You probably have more copper build up too, so you should probably let it soak with hoppes again.

montelores · September 27, 2009, 07:11 AM

Thank you for the response. I mentally connected green with copper, but the revolver is new, so there should be no residue. I realize that the factory fires the weapon, but should there be that much coloration after 1 shot (or even an entire cylinder)?

Thanks for the help -

Monty

mapsjanhere · September 27, 2009, 08:34 AM

You might have been leaching traces of nickel from the SS surface. Some stainless steels get their passivation layer depending on the environment, which is why it stopped after a number of patches. Should you now run some acidic patches, you might get a different color, which is why you don't want to switch back and forth.

montelores · September 27, 2009, 09:10 AM

mjh -

Thanks. I followed up on the passivation point, and I learned something in the process.

So if this had been a carbon steel barrel, this would not have occurred? I have cleaned new, unfired, blued steel barrels in the same manner and have never had this occur.

If it matters, it was a Ruger S/S.

Monty

mapsjanhere · September 27, 2009, 10:40 AM

No, in a regular blued steel barrel that doesn't happen, and neither with a chromed barrel (which relies on an oxide layer which is formed instantly).

montelores · September 27, 2009, 01:06 PM

Thanks again, mjh

Monty

digisol · October 4, 2009, 06:12 PM

Hoppes #9 is very poor for removing copper fouling, it's OK for removing powder fouling but limited in removing copper fouling.

KG-12 copper solvent is the best bar none, Sweets 7.62 is very good, of the Hoppes group, Hoppes BR copper solvent does work to a certain point but that's it, grab some good stuff and save your barrel the guaranteed brush wear, don't use stainless brushes and push right though in one direction only remove and repeat, dont drag it back over the crown or go back and forth inside the barrel, and use a bore guide or muzzle protector.

Asking yourself how long you want to push large amounts of patches through any barrel can be a worry, most wear coming from doubtfull cleaning practices even if done the good bear way.

It would be a fair guess that most all guns are test fired to a certain degree while held in a non moveable jig at the maker, allthough ten rounds might pull it up, the problem comes with having a new rough barrel and the copper it tears off each fired projectile, they are not going to fire one clean, fire one clean, etc etc so your just cleaning up their mess, and you should run in your barrel properly.

It's worth noting that the retailer may have used "your gun" as a new demo in the shop to show other customers which is hardly going to hurt it, but without cleaning properly by anyone who has fired it will be adding to any copper fouling you might end up with, first thing I ever do with a new gun is to smell the thing, most educated noses can tell pretty easy if it's really new, after all the test firing at the factory is done without the stock and the entire gun is then likely dunked in some kind of solvent/cleaner.

My Anschutz BR rifle was testfired as the 10 shot group shows but not with the new bolt I got with it, 100% sure of that as the receiver puts the faintest of scratches on the bolt even covered in the best oil.

Pack a lunch, fire one and clean, fire one clean, fire two clean, fire two clean, etc, fire three clean, each to thier own specific run in procedure, it's common that many new shooters buy a good gun and fire several boxes through it without any cleaning, then wonder why the rifle is a dog shooting 3" - 4" groups, likely copper fouling is very bad, but they can be saved to a point if properly cleaned and re-run in properly, handgun or rifle sme thing.

Good shooting.

September 26, 2009, 09:59 PM	#1
montelores Senior Member Join Date: January 2, 2009 Posts: 239	Green Residue While cleaning a new, unfired (by me) S/S revolver prior to its first use, the used cleaning patch came out of the barrel with a green color on it. I was cleaning with Hoppe's #9, and that must have occurred with 10 patches, until no color was discernible. Then a light swab with oil. I have not seen this before now. What don't I know? Thanks, Monty

September 27, 2009, 08:34 AM	#4
mapsjanhere Senior Member Join Date: August 6, 2009 Location: Albuquerque Posts: 2,832	You might have been leaching traces of nickel from the SS surface. Some stainless steels get their passivation layer depending on the environment, which is why it stopped after a number of patches. Should you now run some acidic patches, you might get a different color, which is why you don't want to switch back and forth. __________________ I used to love being able to hit hard at 1000 yards. As I get older I find hitting a mini ram at 200 yards with the 22 oddly more satisfying.

September 27, 2009, 10:40 AM	#6
mapsjanhere Senior Member Join Date: August 6, 2009 Location: Albuquerque Posts: 2,832	No, in a regular blued steel barrel that doesn't happen, and neither with a chromed barrel (which relies on an oxide layer which is formed instantly). __________________ I used to love being able to hit hard at 1000 yards. As I get older I find hitting a mini ram at 200 yards with the 22 oddly more satisfying.

September 27, 2009, 04:52 AM	#2
ac700wildcat Senior Member Join Date: September 11, 2008 Location: ND Posts: 239	Thats the color that copper fouling turns to when cleaning solvents eat away at it. You probably have more copper build up too, so you should probably let it soak with hoppes again.

September 27, 2009, 07:11 AM	#3
montelores Senior Member Join Date: January 2, 2009 Posts: 239	Thank you for the response. I mentally connected green with copper, but the revolver is new, so there should be no residue. I realize that the factory fires the weapon, but should there be that much coloration after 1 shot (or even an entire cylinder)? Thanks for the help - Monty

September 27, 2009, 09:10 AM	#5
montelores Senior Member Join Date: January 2, 2009 Posts: 239	mjh - Thanks. I followed up on the passivation point, and I learned something in the process. So if this had been a carbon steel barrel, this would not have occurred? I have cleaned new, unfired, blued steel barrels in the same manner and have never had this occur. If it matters, it was a Ruger S/S. Monty

September 27, 2009, 01:06 PM	#7
montelores Senior Member Join Date: January 2, 2009 Posts: 239	Thanks again, mjh Monty

October 4, 2009, 06:12 PM	#8
digisol Member Join Date: October 30, 2008 Location: Central Queensland Posts: 37	Hoppes #9 is very poor for removing copper fouling, it's OK for removing powder fouling but limited in removing copper fouling. KG-12 copper solvent is the best bar none, Sweets 7.62 is very good, of the Hoppes group, Hoppes BR copper solvent does work to a certain point but that's it, grab some good stuff and save your barrel the guaranteed brush wear, don't use stainless brushes and push right though in one direction only remove and repeat, dont drag it back over the crown or go back and forth inside the barrel, and use a bore guide or muzzle protector. Asking yourself how long you want to push large amounts of patches through any barrel can be a worry, most wear coming from doubtfull cleaning practices even if done the good bear way. It would be a fair guess that most all guns are test fired to a certain degree while held in a non moveable jig at the maker, allthough ten rounds might pull it up, the problem comes with having a new rough barrel and the copper it tears off each fired projectile, they are not going to fire one clean, fire one clean, etc etc so your just cleaning up their mess, and you should run in your barrel properly. It's worth noting that the retailer may have used "your gun" as a new demo in the shop to show other customers which is hardly going to hurt it, but without cleaning properly by anyone who has fired it will be adding to any copper fouling you might end up with, first thing I ever do with a new gun is to smell the thing, most educated noses can tell pretty easy if it's really new, after all the test firing at the factory is done without the stock and the entire gun is then likely dunked in some kind of solvent/cleaner. My Anschutz BR rifle was testfired as the 10 shot group shows but not with the new bolt I got with it, 100% sure of that as the receiver puts the faintest of scratches on the bolt even covered in the best oil. Pack a lunch, fire one and clean, fire one clean, fire two clean, fire two clean, etc, fire three clean, each to thier own specific run in procedure, it's common that many new shooters buy a good gun and fire several boxes through it without any cleaning, then wonder why the rifle is a dog shooting 3" - 4" groups, likely copper fouling is very bad, but they can be saved to a point if properly cleaned and re-run in properly, handgun or rifle sme thing. Good shooting.