Quote:
Originally Posted by stansdds
Copper is easiest to remove with solvents that contain ammonia. Sweet's 7.62 contains a lot, and I do mean a whole lot, of ammonia. So much that one is advised to not let it sit in the bore too long as it will also absorb moisture and start to rust the bore, even chrome lined bores can be damaged, but it removes copper like no other solvent.
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I've tried most of them over many years; my list includes Sweet's. It certainly works. The fastest and most effective I've found has been Wipe-Out Patch-Out used along with Wipe-Out Accelerator. Montana X-treme Copper Killer isn't far behind. There are many others, they're just slower.