smoothshooter
Member
Ed's Red Bore Cleaner (ERBC).
WWII G.I. Bore Cleaner has gotten hard to find ... and it smells funky .
I clean my O3-A3 the same day as shooting the corrosive military ammo. And just to make sure I will clean it a second time the next day.
Use brass brush , mop & patches , all soaked in ERBC ... be liberal with the application . Mop and patch until they come clean.
To date no corrosion in the old war horse ...
Buy it from Brownell's or search Ed's Red Bore Cleaner Recipe and make it your self.
Gary
70% isopropyl alcohol should work good also for salts removal only, and evaporates well after 30 seconds or so, but I have not used it for this application, though.
Works great on black powder guns.