r/canadaguns • u/gussy1412 • 26d 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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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.