howdy Marlin lovers, i just got a previously fired 30 30 and I have a couple of questions. should I assume the barrel has copper fouling in it? Can I see copper fouling in the barrel? And once I get the barrel clean should I slug my barrel or assume a .311 cast bullet will work the best? If I slug the barrel should I just push the ball in a couple of inches from the breech or crown or both. I appreciate the help thanks!