Has anyone used house hold ammonia to clean copper fouling out of barrel groves?

After a range trip with my 460 XVR and shooting 80 rounds, my barrel grooves were bright shiny copper coated. With many repetitions with No. 9 soaked patches, wait, passes with bronze brush, clean patch, and then start all over, I slill can't get the barrel back to clean stainless steel.

I have seen that some (expensive) copper fouling cleaners contain ammonia, so why can't I just use house hold ammonia? Of course I would clean all traces of ammonia off.

This site has the results of a test of common commercial and homemade gun cleaning solvents. Ammonia is included:

http://www.frfrogspad.com/cleaners.htm

Montana X-treme 50 BMG

I shoot long range rifles and this is the best stuff around. It will not harm barrels as other ammonia-based solvents will.

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John

thanks for the info