I have a Kalibr Cricket II Tactical in 30 caliber. Removed the shroud to clean the barrel. Using a patch worm, pulled several dry patches through and got black. Next, used Balistol and got medium brown patches. Dry patches next and got medium brown to light brown results. I have another air rifle from a different manufacturer and get the same results. Is this normal and if it is, what causes the brown color?
Thanks
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