Recently I had a problem with copper foul in my barrel. I used Sweets 7.62 to clean it up. Fine. The past two weekends I've gone out to the range and shot about 20 bullets each time. Each time when cleaning the gun afterwards I've ran a patch through with a bit of sweets on it and the patch is coming out with some blue on it each time. Is this common to get foul with that frequency? Is it going to become common practice for me to be using sweets with this gun each time I clean it? I thought that sweets was something that you didn't want to use regularly. Thanks in advance for any comments.