Lot of people over the years have ruined barrels with heavy solvents and aggressive cleaning. The biggest problems I see is harming a barrel crown by improperly using a brush.How would you damage a barrel by cleaning with brass and patches? (sincere question)
Some people don't wash their cars and they run fine. Like I said I don't mind a dirty gun, but when DO clean it - it concerns me when I can't get it clean.
Not entirely. I have shot some lead bullets through it as well, so it might be that too - just with some copper color stuck on top of it I guess?
Hi, I don't reload myself. These are "factory reloads" and I only shot them to see how a heavier bullet feels, I don't usually stock or buy this ammo.
http://www.ipscstore.eu/en/aresammo/946-ares-9x19-luger-150gr-50pcs-box-2000000009469.html
"Surface: CEPRX - Ares casted colour full painted bullets, similar to TMJ"
I guess my point is that in a pistol barrel it doesn't matter in terms of accuracy. If you manage to get the barrel pristine unless you plan on never shooting it again it will be fouled the next time out. I am not saying allow excessive build up but a small amount of copper fouling is nothing to worry about. IMHO YMMV