Is it common for jacketed bullets to leave heavy copper streaks in the barrel? Is it fairly easy to clean and remove the copper from the barrel or is it a tough job? I just brought my gun home today after waiting 10 days so I'm going to clean it later and see. I was able to check it out and shoot it during the day when the range was open and that's when I noticed the streaks from the Magtechs. I'm just assuming that lead fouling would be easier to clean from the bore than copper but I may be wrong. I'm looking for a good practice load to use for bowling pins, paper, and steel right now and later I'm gonna work on some hunting loads.