Hi guys,

Sorry if this is a stupid question. I have a Shillen .308 Chrome Moly barrel. I've been cleaning with Butch's Bore Shine, Sweet's 7.62, using Dewey bronze and nylon brushes. I finish with a wipe of Kroil down the bore and then a few patches through to dry it. Today after cleaning, I noticed that near the muzzle, there was a reddish/brown color in/along the rifling grooves. I can't tell if that's the case throughout the barrel or just near the muzzle. Is this normal? I never noticed this before. I can't tell if it's due to wear, or if I'm not cleaning good enough... I spent about an hour cleaning, scrubbing quite a bit with the brushes but also just running a lot of soaked patches through. This isn't rust or anything is it? Perhaps visible copper fouling?