A lot of the BLUE is from the bronze brush used to scrub the barrel, I am old school I use Hoppes No9 and Sweets 7.62 solvent,
I first run a bristle brush through to clean out the powder residue then a patch with Hoppes let it soak for a bit then scrub with a bronze brush and Hoppes 10 or 20 passes patch out with Hoppes three patches, run dry patches though to remove the Hoppes,
Then a patch with Sweets let it soak a couple of minutes run a clean patch should be spotless if it has blue then scrub with Sweets
on a Nylon brush and patch until there is no blue, finish with a patch of Hoppes or a good gun oil, Don't leave Sweets in a barrel more than 20 minutes it can etch the barrel,"so I have heard", some of the new solvent are said to be better than Hoppes the Bench-rest crowd swear by Butches products if you are in the market would be worth a try. Robert.
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