since im off with a broken leg i have nothing but time on my hands, so i decided to laser bore sight my new .22 to my red dot, and while i was in there i decided to see how some of my other rifles were doing. my sks was out to lunch but lets be honest, its an sks and shoots 5 inch groups at 100 so how the hell do you zero that scope in, lol. pull out the r700 to see how my windage is, and it was spot on, except when the light hit the barrel i noticed what looked like rust in it. i put my bore light in and it looks shiney and silver and clean, but when i look down the barrel i see a rusty color. i ran my bore brush and cleaner through it several times and some patches but its still there. im guessing this is copper fouling?