I fired 20 rounds of Corrosive 1977 Yugo 762X39 through my very clean Mini's bore and it looks like it has fired 10,000 rounds of cheap 22LR! The carbon build-up is terrible!
I poured boiling water down the bore followed by 1950's GI bore cleaner with little effect.
What can I use to break-up the grunge?
I poured boiling water down the bore followed by 1950's GI bore cleaner with little effect.
What can I use to break-up the grunge?