I have recently acquired a .375 ruger. So far it has a total of 34 rounds down the tube. I was told it was broke in correctly and cleaned after every shot and then every couple. I personally put 19 rounds through and a buddy put 2. At the range I cleaned mid session or so. When I got the rifle I noticed the rifleling looked copperish. Well today I tried to clean it using Hoppe's Elite copper, lead and carbon fouling bbl cleaner until the patches came out white. Then used Hoppe's Elite Copper cleaner, really thick stuff. The patches come out greenish. Let soak for 10 minutes 3 different sets, following the direction inbetween. Then still copper fouling can be seen so cleaned with the Hoppe's Elite general cleaner and patches come out clean. So I am unsure what to do. Never had this problem before. Directions say just to let sit for 5 to 10 minutes, with out getting on any finishes and such and only for inside barrel use only.
Is it okay to let the Hoppe's Elite Copper cleaner sit in the bbl for a day? What else to use or do? Does copper fouling hurt anything, actually on the lans, some in the grooves. Accuracy is good. Just not sure what to do or how to go about getting the copper fouling out. Thanks for any help any of you can offer.