Hello everyone, i just purchased a beretta PX4 storm .40. this is my first handgun and i had a quick question. i just got done cleaning the gun and getting all of the factory oil off of it. I was told that it is ok to use the copper brush to clean the inside of the barrel (the bore?). Can you confirm or deny that it is ok? I looked at the barrel and it is very clean but i saw about 5 small, fine, hairline scratches. Did i just damage my barrel? All i did was dip the copper brush into the Hoppes 9 solvent. and i pushed the brush from the backend to the front of the barrel. I didnt go back and forth. I did this about five times.