Re: Need Serious Gun Help
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Sorry... but I have a gallon milk jug full of very green patches - ALL of them are Hoppe's #9. It cuts copper.
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Not really, just rubs the heck out of it, which if you rub long and hard enough you can get anything out. It was never designed to be an "efficiant method of cleaning" and copper removal, which was the original question. #9 was originally made for carbon, powder and lead. Hoppes BR was later designed for copper removal and is exactly the same price by the way.
More efficiant cleaners are better for barrels as your rod spends less time in the barrel. Most people do not use bore guides and decent rods and end up damaging their barrels in the long run.
Worrying about leaving modern solvents in barrels really is not an issue. There are almost zero cleaning solvents out on the market now that really are dangerous to leave in barrels. Sweets 7.62 might be the last.
I know that Montana Extreme 50 BMB, ME Copper Creme, Butches Bore Shine, Barnes, Eliminator etc, all can be left safely in barrels for as long as you want. Plus they are designed to work without having to fill the barrel and leave overnight to get copper out. That is old school, when nothing else worked.
When you use a borescope, you find out what works and what does not, and what is reality.