About 200 rounds down the barrel.
https://imgur.com/a/MnWe4Is
About 200 rounds down the barrel.
https://imgur.com/a/MnWe4Is
Copper fouling from the copper bullet jacket. Normal. When you clean it the patches may come out a little green looking
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You are seeing copper fouling. It can be removed with a copper remover such as Sweet's.
If accuracy hasn't suffered, I would not worry about copper fouling.
Train 2 Win
What kind of barrel? Chrome lined? Stainless Steel?
FWIW, Sweets sucks at copper removal. I will, every so often, knock down the copper fouling in my Bolt gun 308. I used to use Sweets... then one time I followed up with Bore Tech copper remover, and there was a mess of green nasty left in the bore that sweets had left behind.
"What would a $2,000 Geissele Super Duty do that a $500 PSA door buster on Black Friday couldn't do?" - Stopsign32v
The barrel is a Faxon pencil profile nitrided barrel.
Unless your barrel has taken a sudden performance dump, put the borescope away and don't fret on what you see.
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