So i am a little confused/out of the loop. Whats the difference between brass and nylon bore brushes. I have always used the brass type and i just recently discovered the nylon type. Are they for certain parts or certain kinds of material? And second question here is whats the best cleaning solvents and lubes for firearms? I shoot any where from 500 to 1,000 rounds a month. And i live in a dry sandy and dusty environment.