Which copper solvent is best? Let me know in the comments if there are any other solvents to test.

Testing out the seven copper solvent cleaners. The bullet will be in the cleaner for one week. 

[@Rico11b]

That Montana Extreme Copper killer is potent stuff. I can't use it indoors, it's harsh. :) I did this same test, but over a 20 day period. The copper killer removed ever so slightly more copper than the Hoppes #9. Just barely more, but Hoppes #9 was the clear second place winner over the others I've tested. I'd choose Hoppes over the Copper Killer, just because of the smell. :)

[@pkplith]

#9 is the best

[@RifleAccuracyandReloading]

@@pkplith Not even close… unless you’re talking aftershave