You have until march to get to surplusrifles.com and google your heart out on all their topics (or buy their Big CD and Big CD 2(which HAS all the topics)
one of them is ; HOW TO MAKE YOUR OWN ELECTROLYTIC BORE CLEANER (ala Outers)
It uses ammonium acetate as the electrolyte for lead. It uses Copper acetate for copper, but their article says the ammonia/vinegar/water mixture that becomes ammonium acetate works just as well.
Built the device, now trying to get a good plug to seal the bbl at muzzle to keep electrolyte IN THERE where it belongs for 1 hour
yodar