I think all this "corrosive" is overrated. I have a Mosin-Nagant rifle dated 1898, it fought in 4 wars at least shooting corrosive ammo... but still, it has good bore (not perfect, but the gun is over 100 years old!).
I think my shooting areas and gun storage must be super dry because just out of curiosity I left a crappy SKS for 5 days without touching it. There were no signs of anything corrosive anywhere on the gun. That being said, I always try to clean them up as soon as I get home still. I enjoy tearing guns apart.


















































