r/canadaguns • u/gussy1412 • 25d ago

Misc Rust or copper fouling?

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Hey folks, anyone able to help me with determining whether or not this is copper fouling or rust? The first time I shot this gun it rained on me, and it’s possible I didn’t get all the moisture off of it. I just cleaned the bore and ran an oiled patch through.

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12

u/zporb 25d ago

copper

2

u/gussy1412 25d ago

Thank you!

5

u/DryF1re 25d ago

If you are getting this much copper fouling, make sure to get a bore brush. The cleaning oil/rag combo will get rid of carbon and soot but the copper will remain unless you have a brass brush.

1

u/gussy1412 25d ago

I did use a brass brush on it w/ Hoppe’s bore cleaner. Maybe I didn’t do enough passes on it, I’ve only put about 50 or so rounds through it.

2

u/CanadianBoyEh 25d ago

Try something specific for copper fouling, instead of a general CLP like Hoppe’s. I like BoreTech CU+2.

1

u/gussy1412 25d ago

Is copper fouling in general an issue? Or is it only something that you need to worry about if it’s causing accuracy issues?

2

u/waitwhatnothing 25d ago

Really just a problem when accuracy starts to drop off. 

Plain bore cleaners like hoppes no. 9 won’t touch it, you need something specifically for copper fouling. 

1

u/gussy1412 25d ago

That’s what I figured. Thanks a bunch! I’m new to shooting so this info is very helpful for me.

1

u/barthammer 25d ago

Pro-Shot SVC-8 Copper Solvent IV is what I've used. Push through a couple soaked patches, let sit for 10-15 mins, scrub with a brush soaked in it, run some dry patches through. Repeat until the patches come out clean.

Hoppes wouldn't touch copper fouling for me. I think it's more for carbon/lead fouling.

1

u/swhissell 23d ago

Agree with others that this is copper. No worries!