I have been using DBC for many years. It was recommended John Barness, who I feel is a straight shooter when it comes to his writing. He claims and I also found it to be true that once applied, which is as easy as applying to a bore swap and lightly moping the barrel with it and then letting it dry, firing afterwards a couple shots actually melts the ceramic in it filling the pores of the metal giving a very smooth coat. It then makes cleaning much easier in what was once rough and harder to clean barrels.
I started using it in some Contender barrels and a few other handguns, before applying it to a couple surplus rifles with not so good bores. I found it made the surplus rifles shoot with noticeable better accuracy. I have not done enough testing to see how much difference it makes with better condition barrels.
However Barness claims to have done considerable testing with very good results.
David Reiss - NRA Life Member & PSC Range Member Retired Police Firearms Instructor/Armorer
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